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Measure of the ratio of atoms of one kind (i) to another kind (j)
The atomic ratio is a measure of the ratio of atoms of one kind (i) to another kind (j). A closely related concept is the atomic percent (or at.%), which
Atomic_ratio
Concept in marine biology
The Redfield ratio or Redfield stoichiometry is the consistent atomic ratio of carbon, nitrogen and phosphorus found in marine phytoplankton and throughout
Redfield_ratio
Type of atomic measurement
quantity defined as the ratio of the average mass of atoms of a chemical element in a given sample to the atomic mass constant. The atomic mass constant (symbol:
Relative_atomic_mass
Rest mass of an atom in its ground state
different ratios of protons and neutrons. atomic masses are reduced, by the binding energies between the protons and neutrons. The ratio of atomic mass to
Atomic_mass
Form of matter
of two hydrogen atoms bonded to a single oxygen atom (i.e. H2O). The atomic ratio of hydrogen to oxygen is always 2:1 in every molecule of water. Pure
Substance_(chemistry)
Organic compound that consists only of carbon, hydrogen, and oxygen
derivative. For the simplest carbohydrates, the carbon-to-hydrogen-to-oxygen atomic ratio is 1:2:1, i.e. they are often represented by the empirical formula (CH2O)n
Carbohydrate
Graphical plots used to assess the origin and maturity of kerogen and hydrocarbons
The diagram cross-plots the hydrogen:carbon atomic ratio as a function of the oxygen:carbon atomic ratio. Beginning around 2003, the diagrams are often
Van_Krevelen_diagram
Solid organic matter in sedimentary rocks
terms of conventional oil retorting. Hydrogen:carbon atomic ratio > 1.25 Oxygen:carbon atomic ratio < 0.15 Derived principally from lacustrine algae, deposited
Kerogen
Innermost Galilean moon of Jupiter
gravity of any natural satellite, and the lowest amount of water by atomic ratio of any known astronomical object in the Solar System. With over 400 active
Io_(moon)
Ratio of neutrons to protons in an atomic nucleus
The neutron–proton ratio (N/Z ratio or nuclear ratio) of an atomic nucleus is the ratio of its number of neutrons to its number of protons. Among stable
Neutron–proton_ratio
Clock that monitors the resonant frequency of atoms
An atomic clock is a clock that measures time by monitoring the resonant frequency of atoms. It is based on the fact that atoms have quantised energy levels
Atomic_clock
Number of protons found in the nucleus of an atom
The atomic number or nuclear charge number (symbol Z, from the German Zahl, "number") of a chemical element is the charge number of its atomic nucleus
Atomic_number
hydrogen gas to be elemental, given an atomic weight of 1. Thus the 1:7 measured ratio means oxygen gets an atomic weight of 7 in Dalton's system. However
History_of_atomic_theory
Mass of a stationary electron
{C}}^{6+})}}=0.000\,274\,365\,185\,89(58)} As the relative atomic mass of 12C6+ ions is very nearly 12, the ratio of frequencies can be used to calculate a first
Electron_mass
Something that has mass and volume
of two hydrogen atoms bonded to a single oxygen atom (i.e. H2O). The atomic ratio of hydrogen to oxygen is always 2:1 in every molecule of water. Pure
Matter
Naturally occurring mineral form of calcium apatite
; Thomas, P. (2002). "Calcium phosphate apatites with variable Ca/P atomic ratio I. Synthesis, characterisation and thermal stability of powders". Biomaterials
Hydroxyapatite
Various colors of gold obtained by alloying gold with other elements
surface, followed by indium plating, with layer thickness matching the 1:2 atomic ratio. A heat treatment then causes interdiffusion of the metals and formation
Colored_gold
Standard unit of mass for atomic-scale entities
The dalton (symbol: Da), or unified atomic mass unit (symbol: u), is a unit of mass defined as 1/12 of the mass of an unbound neutral atom of carbon-12
Dalton_(unit)
Ratio of magnetic moment to angular momentum
the gyromagnetic ratio (also sometimes known as the magnetogyric ratio in other disciplines) of a particle or system is the ratio of its magnetic moment
Gyromagnetic_ratio
Smallest unit of a chemical element
lowest mass) has an atomic weight of 1.007825 Da. The value of this number is called the atomic mass. A given atom has an atomic mass approximately equal
Atom
1945 attacks in Japan during WWII
On 6 and 9 August 1945, the United States detonated two atomic bombs over the Japanese cities of Hiroshima and Nagasaki, respectively, during the final
Atomic bombings of Hiroshima and Nagasaki
Atomic_bombings_of_Hiroshima_and_Nagasaki
Conversion of dinitrogen into ammonia
atoms of carbon, roughly 2 to 20 atoms of nitrogen are assimilated. The atomic ratio of carbon (C) : nitrogen (N) : phosphorus (P) observed on average in
Nitrogen_fixation
Ionized part of Earth's upper atmosphere
on the Earth. However, there are seasonal changes in the molecular-to-atomic ratio of the neutral atmosphere that cause the summer ion loss rate to be even
Ionosphere
Atoms of the same element, but different mass
for most elements. Even for the lightest elements, whose ratio of neutron number to atomic number varies the most between isotopes, it usually has only
Isotope
Cyclical variations in the ratio of the abundance of oxygen
isotope ratio cycles are cyclical variations in the ratio of the abundance of oxygen with an atomic mass of 18 to the abundance of oxygen with an atomic mass
Oxygen_isotope_ratio_cycle
Chemical compound
concluded that lithium and aluminum were present in the ratio of 0.8Li:2Al, which, he says, is an atomic ratio of approximately 1Li:2Al. According to him lithium
Lithium_aluminate
Sulfide mineral
copper ores. The reasons for this is its high copper content (66.7% atomic ratio and nearly 80% by weight) and the ease at which copper can be separated
Chalcocite
Type of spectroanalytical procedure
Atomic absorption spectroscopy (AAS) is an elemental analysis method for determining the concentration of metals in a given sample. The principle of AAS
Atomic absorption spectroscopy
Atomic_absorption_spectroscopy
Number of heavy particles in the atomic nucleus
confused with the standard atomic weight (also called atomic weight) of an element, which is the ratio of the average atomic mass of the different isotopes
Mass_number
Silica-undersaturated aluminosilicate mineral
potassium ions and the irregular sites by smaller sodium ions, yielding an atomic ratio of sodium to potassium of 3:1. This corresponds to an ideal weight percentage
Nepheline
Subatomic particle with positive charge
mass ratio). Protons and neutrons, each with a mass of approximately one dalton, are jointly referred to as nucleons (particles present in atomic nuclei)
Proton
Nanomaterial
nanoparticles (FePt NPs) are 3D superlattices composed of an approximately equal atomic ratio of Fe and Pt. Under standard conditions, FePt NPs exist in the face-centered
Iron–platinum_nanoparticle
Lightweight black residue, made of carbon and ashes, after pyrolysis of biomass
evolution of biochar atomic ratios in the production process. In the carbonization process, both the H/C and O/C atomic ratios decrease due to the release
Biochar
Chemical element with atomic number 8 (O)
Oxygen is a chemical element; it has the symbol O and its atomic number is 8. It is a member of the chalcogen group in the periodic table. It is highly
Oxygen
International. Atomic mass: (applies to each element) the average mass of the atoms of an element, in daltons (Da), a.k.a. atomic mass units (amu). Atomic number:
List_of_materials_properties
Class of stony meteorites made of round grains
silicon (Si), to use as a reference point, and then compare ratios. Thus, the atomic ratio of Mg/Si measured in the sun (1.07) is identical to that measured
Chondrite
Analytical method
the same time, such spectra lack quantitative information about the atomic ratios of different types of carbon nuclei, because the nuclear Overhauser
Carbon-13 nuclear magnetic resonance
Carbon-13_nuclear_magnetic_resonance
Rare sulfosalt mineral
microanalysis. The atomic ratio of tsugaruite is close to that of other lead-antimony chloro-sulfosalts and just above the atomic ratio of dadsonite. Tsugaruite
Tsugaruite
Chemical compound
3H2O·P2O5 24WO3·59H2O, (P2W24O80H6)·29H2O, which correctly identifies the atomic ratios of P, W and O. This formula was still quoted in papers as late as 1970
Phosphotungstic_acid
Chemical process
Graphite oxide is a compound of carbon, oxygen, and hydrogen where there is a ratio between 2.1 and 2.9 of carbon to oxygen. Graphite oxide is typically a yellowish
Hummers'_method
British chemist and physicist (1766–1844)
physicist, and meteorologist whose work laid the foundations of modern atomic theory and stoichiometric chemistry. Building on earlier ideas about the
John_Dalton
Organic-rich fine-grained sedimentary rock containing kerogen
and 1.5:5. At the same time, the organic matter in oil shale has an atomic ratio of hydrogen to carbon (H/C) approximately 1.2 to 1.8 times lower than
Oil_shale
Ratio of cation radius to anion radius
radius ratio can be used to predict the crystal structure of an ionic compound based on the relative size of its atoms. It is defined as the ratio of the
Cation-anion_radius_ratio
backbone of the polymer. The fluorine-to-carbon atomic ratio (F/C ratio) is reduced from PTFE's theoretical ratio of 2.0 to 0.2 or less, after exposure to sodium
Surface_treatment_of_PTFE
Type of microscopy
Atomic force microscopy (AFM) or scanning force microscopy (SFM) is a very-high-resolution type of scanning probe microscopy (SPM), with demonstrated resolution
Atomic_force_microscopy
Chemical compound
sublimation temperature of the condensed vapour. In some investigations the atomic ratio of a component of the vapour was found by using radioactive nucleides
Polonium_diiodide
Chemical compounds made of only carbon and oxygen
room temperature into a carbon-oxygen polymer, with 3:2 carbon:oxygen atomic ratio. The polymer is believed to be a linear chain of fused six-membered lactone
Oxocarbon
Mixing (superposition) of atomic orbitals
the concept of mixing atomic orbitals to form new hybrid orbitals (with different energies, shapes, etc., than the component atomic orbitals) suitable for
Orbital_hybridisation
Energy released in nuclear weapons explosions
The efficiency of an atomic bomb is the ratio of the actual yield to the theoretical maximum yield of the atomic bomb. Not all atomic bombs possess the same
Nuclear_weapon_yield
Topics referred to by the same term
of a quantum system weakly coupled to its environment Redfield ratio, the atomic ratio of carbon, nitrogen and phosphorus found in phytoplankton and throughout
Redfield
Atom laser Atom probe Atomic clock Atomic coherence Atomic fountain Atomic line filter Atomic ratio Atomic spectroscopy Atomic vapor laser isotope separation
List_of_laser_articles
Relative atomic mass as defined by IUPAC (CIAAW)
measurements), and the ratio of the three isotopes 36Ar : 38Ar : 40Ar in the atmospheres of the outer planets is 8400 : 1600 : 1. The atomic weight of argon
Standard_atomic_weight
Molecule composed of any two atoms
original atomic hypothesis assumed that all elements were monatomic and that the atoms in compounds would normally have the simplest atomic ratios with respect
Diatomic_molecule
System of measurement
The atomic units are a system of natural units of measurement that is especially convenient for calculations in atomic physics and related scientific fields
Atomic_units
Type of solid, amorphous organic matter
thermal processes driving the molecular cross-linking also decrease the atomic ratio of hydrogen to carbon from greater than one to less than one and ultimately
Pyrobitumen
Calculation of relative masses of reactants and products in chemical reactions
produced. Because of the well-known relationship of moles to atomic weights, the ratios that are arrived at by stoichiometry can be used to determine
Stoichiometry
Core of an atom composed of nucleons
The atomic nucleus is the small, dense region consisting of protons and neutrons at the center of an atom, discovered in 1911 by Ernest Rutherford at the
Atomic_nucleus
Reaction that combines atomic nuclei
Nuclear fusion is a reaction in which two or more atomic nuclei combine to form a larger nucleus. The difference in mass between the reactants and products
Nuclear_fusion
Reaction that splits an atomic nucleus
{N} m_{n}-\mathbf {B} /c^{2}} where A is mass number, Z is atomic number, mH is the atomic mass of a hydrogen atom, mn is the mass of a neutron, and c
Nuclear_fission
Type of high-temperature superconductor
sintering of a homogeneous mixture of Y2O3, BaCO3 and CuO in the appropriate atomic ratio. Calcination is done at 1,070 to 1,220 K (800 to 950 °C), whereas sintering
Cuprate_superconductor
Conversion constant for amount of substance
the Avogadro constant, commonly denoted NA, is a conversion constant or ratio between an amount of substance and the number of particles that it contains
Avogadro_constant
The atomic radius of a chemical element is the distance from the center of the nucleus to the outermost shell of an electron. Since the boundary is not
Atomic radii of the elements (data page)
Atomic_radii_of_the_elements_(data_page)
Pair of research nuclear reactors in Nilore, Islamabad, Pakistan
The Pakistan Atomic Research Reactor or (PARR) are two nuclear research reactors and two other experimental neutron sources located in the PINSTECH Laboratory
Pakistan Atomic Research Reactor
Pakistan_Atomic_Research_Reactor
Physical quantity of interest in chemistry and electrodynamics
The mass-to-charge ratio (m/Q) is a physical quantity relating the mass (quantity of matter) and the electric charge of a given particle, expressed in
Mass-to-charge_ratio
Nuclear reactor generating more fissile material than it consumes
the thorium fuel cycle has an atomic weight of 232, while the fertile material in the uranium fuel cycle has an atomic weight of 238. That mass difference
Breeder_reactor
Sedimentary rock found in Estonia
Assay oil yield is 3–5%. In northeastern Estonia its carbon-to-hydrogen atomic ratio is about nine. Graptolitic argillite from the northeastern region contains
Graptolitic_argillite
Isotope of hydrogen with one neutron
about twice the mean hydrogen atomic weight of 1.007947 Da, or twice protium's mass of 1.007825 Da. The isotope weight ratios within other elements are largely
Deuterium
Fraction of total particles in a sample which decay by a given mode
particle physics and nuclear physics, the branching fraction (or branching ratio) for a decay is the fraction of particles which decay by an individual decay
Branching_fraction
Chemical substance not composed of simpler ones
protons. The number of protons is called the atomic number of that element. For example, oxygen has an atomic number of 8: each oxygen atom has 8 protons
Chemical_element
World War II Allied nuclear weapons program
maintained control over American atomic weapons research and production until the formation of the United States Atomic Energy Commission (AEC) in January
Manhattan_Project
Light-brown marine type oil shale of Ordovician age
65–67% conversion ratio into shale oil and oil shale gas. Fischer Assay oil yield is 30 to 47%. Its organic matter has an atomic ratio of hydrogen to carbon
Kukersite
between the probe and the sample, which can be sufficiently small to allow atomic resolution. Using a physical tip (e.g. AFM or STM) does have some disadvantages
Scanning_helium_microscopy
Boron chemical complexes
bonding depend strongly on the metal element M and on its atomic ratio to boron. When B/M ratio exceeds 12, boron atoms form B12 icosahedra which are linked
Crystal structure of boron-rich metal borides
Crystal_structure_of_boron-rich_metal_borides
In physics, proton and neutron magnetism
magnetic resonance. The neutron's magnetic moment is exploited to probe the atomic structure of materials using scattering methods and to manipulate the properties
Nucleon_magnetic_moment
Atomic model introduced by Niels Bohr in 1913
In atomic physics, the Bohr model or Rutherford–Bohr model is an obsolete model of the atom that incorporated some early quantum concepts. Developed from
Bohr_model
Type of nuclear reactor
Solution heights were adjusted to criticality with D2O solutions at D/235U atomic ratios of 1:230 and 1:419 in the smaller tank and 1:856 to 1:2081 in the larger
Aqueous_homogeneous_reactor
Quantity with no physical dimension
defined units. For instance, alcohol by volume (ABV) represents a volumetric ratio; its value remains independent of the specific units of volume used, such
Dimensionless_quantity
SI unit of amount of substance
may be specified. The molar mass of a substance is equal to its relative atomic (or molecular) mass multiplied by the molar mass constant, which is almost
Mole_(unit)
Mass per amount of substance
usage) of a chemical substance (element or compound) is defined as the ratio between the mass (m) and the amount of substance (n, measured in moles)
Molar_mass
Materials with a well-defined isotopic composition
website of the International Atomic Energy Agency. Note that the 13C/12C ratio of Vienna Pee Dee Belemnite (VPDB) and 34S/32S ratio of Vienna Canyon Diablo
Reference materials for stable isotope analysis
Reference_materials_for_stable_isotope_analysis
Study involving matter and electromagnetic radiation
physical and electronic structure of matter to be investigated at the atomic, molecular and macro scale, and over astronomical distances. Historically
Spectroscopy
Thin-film deposition technique that deposits one 1-atom thick layer at a time
Atomic layer deposition (ALD) is a thin-film deposition technique based on the sequential use of a gas-phase chemical process; it is a subclass of chemical
Atomic_layer_deposition
How nuclear fuel behaves during a reactor accident
solution of urania in yttria-stabilized zirconia (YSZ), with a Y:Zr atomic ratio of 1:4. Urania particles in an inert matrix composed of a mixture of
Behavior of nuclear fuel during a reactor accident
Behavior_of_nuclear_fuel_during_a_reactor_accident
Atomic orbital Atomic orbital model Atomic packing factor Atomic percent Atomic physics Atomic ratio Atomic scale Atomic scales Atomic spacing Atomic
Index_of_physics_articles_(A)
Characterization of nuclide stability
stability at a faster rate than atomic number. The line of beta stability follows a particular curve of neutron–proton ratio, corresponding to the most stable
Valley_of_stability
Isotope of Carbon
importance in its use as the standard from which atomic masses of all nuclides are measured, thus, its atomic mass is exactly 12 daltons by definition. Carbon-12
Carbon-12
nucleosynthesis as part of the process producing helium from hydrogen The ratio between 16 O and 18 O is used to deduce ancient temperatures. Can be used
Isotopes_of_oxygen
Transfer of momentum from an elementary particle to an atom
In nuclear physics, atomic recoil is the result of the interaction of an atom with an energetic elementary particle, when the momentum of the interacting
Atomic_recoil
Chemical element with atomic number 118 (Og)
Oganesson is a synthetic chemical element; it has symbol Og and atomic number 118. It was first synthesized in 2002 at the Joint Institute for Nuclear
Oganesson
considered to be stable. Overall, there are 251 known stable isotopes in total. Atomic nuclei consist of protons and neutrons, which attract each other through
List of elements by stability of isotopes
List_of_elements_by_stability_of_isotopes
Isotope of helium
initially been created in about a 6:1 ratio cooled to the point where nuclear binding was possible, almost all atomic nuclei to form were helium-4 nuclei
Helium-4
First modern model of the atom
1897, and was rendered obsolete by Ernest Rutherford's discovery of the atomic nucleus in 1911. The model tried to account for two properties of atoms
Plum_pudding_model
Branch of geology
fuels in its lower content of organic matter. The organic matter has an atomic ratio of hydrogen to carbon of about 1.5 – approximately the same as that of
Oil_shale_geology
Glass containing one or more of sulfur, selenium and tellurium
chalcogen and a group 14 or 15 element and may be formed in a wide range of atomic ratios. Ternary glasses are also known. Not all chalcogenide compositions exist
Chalcogenide_glass
Crystallographic defect; an atom missing from a lattice site
constant, T is the absolute temperature, and N is the concentration of atomic sites i.e. N = ρ N A M {\displaystyle N={\frac {\rho N_{\rm {A}}}{M}}} where
Vacancy_defect
Survivors of atomic bombings in Japan
word of Japanese origin generally designating the people affected by the atomic bombings of Hiroshima and Nagasaki by the United States at the end of World
Hibakusha
Measure of relative carbon-13 concentration in a sample
same ratio, including one known as VPDB (for "Vienna PDB"), have replaced the original. The 13C/12C ratio for VPDB, which the International Atomic Energy
Δ13C
commonly measured via isotope ratio mass spectrometry and expressed as parts per thousand (‰ or "per mille") divergence from the ratio of a standard: δ C 13 =
Isotopes_of_carbon
Chemical compound
occupancies of ca. 60–70%, and the YB25 formula merely reflects the average atomic ratio [B]/[Y] = 25. Both the Y atoms and B12 icosahedra form zigzags along
Yttrium_borides
Related to Periodic Table
not, be a stable nuclide). This single nuclide will have a characteristic atomic mass. Thus, the element's natural isotopic abundance is dominated by one
Mononuclidic_element
ATOMIC RATIO
ATOMIC RATIO
Male
Hungarian
Pet form of Hungarian Tamás, TOMI means "twin."
Boy/Male
Hindu
Atom
Girl/Female
Indian
Atom
Boy/Male
Anglo Saxon
Horrible.
Boy/Male
Hindu
The soul
Boy/Male
Tamil
Atom
Boy/Male
Hindu
Atom
Boy/Male
Tamil
Atom
Girl/Female
Tamil
Anu Keerthi | அநà¯Â கிரதீ Â
Atom
Anu Keerthi | அநà¯Â கிரதீ Â
Girl/Female
Tamil
Atom
Girl/Female
Gujarati, Hindu, Indian, Marathi, Telugu
Sunrise; Comic
Boy/Male
Gujarati, Hindu, Indian
Topic; Subject
Male
Japanese
(富) Japanese name TOMIO means "treasured man."
Boy/Male
African, Australian, Finnish, Japanese
The People; Twin; Happy Child
Girl/Female
Hindu
Atom
Boy/Male
Indian
An Atom's Warrior
Boy/Male
Czechoslovakian
Girl/Female
British, English, French, Italian
Lovely
Boy/Male
Hindu, Indian
Relating to the Soul
Girl/Female
Hebrew
Strong as an oak.
ATOMIC RATIO
ATOMIC RATIO
Male
Finnish
Finnish form of Greek Ioannes, JUKKA means "God is gracious."
Girl/Female
Assamese, Hindu, Indian, Kannada, Telugu, Traditional
Prosperity
Boy/Male
American, Australian, British, Celtic, Chinese, Christian, Danish, English, French, German, Greek, Indian, Swiss
Vigilant Watchman; Fierce; Watchful; Vigilant
Boy/Male
Hindu
Girl/Female
Tamil
Shreeparna | à®·à¯à®°à¯€à®ªà®°à¯à®£à®¾
Tree adorned with leaves
Boy/Male
Hebrew, Hindu, Indian
Gift from God
Boy/Male
Egyptian
Hope.
Girl/Female
Australian, Finnish
Sun Ray
Girl/Female
Hindu, Indian, Marathi, Sanskrit
Well Formed; Beautiful
Male
Hebrew
(×ֲרִי×ָב) Hebrew name ARIAV means "father is a lion."
ATOMIC RATIO
ATOMIC RATIO
ATOMIC RATIO
ATOMIC RATIO
ATOMIC RATIO
a.
Pertaining to, or characterized by, aptotes; uninflected; as, aptotic languages.
n.
Nomic spelling.
a.
Characterized by atony, or want of vital energy; as, an atonic disease.
n.
One who holds to the atomic philosophy or theory.
a.
Produced without sexual union; as, agamic or unfertilized eggs.
n.
An atom; a mite; a pigmy.
a.
Of or pertaining to atoms.
v. t.
To reduce to atoms, or to fine spray.
n.
A tonic element or letter; a vowel or a diphthong.
a.
Relating to the etymon; as, an etymic word.
n.
An Adonic verse.
v. t.
To reduce to atoms.
a.
Unaccented; as, an atonic syllable.
a.
Of or pertaining to atoms; relating to atomism.
a.
Containing two atoms.
a.
Alt. of Atomical
n.
The doctrine of atoms. See Atomic philosophy, under Atomic.
a.
Pertaining to azote, or nitrogen; formed or consisting of azote; nitric; as, azotic gas; azotic acid.
a.
Aeolian, 1; as, the Aeolic dialect; the Aeolic mode.
a.
Having two replaceable atoms or radicals.