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atomic weight definition

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All other elements have two or more isotopes, so their atoms have at least two different masses. Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free! The atomic weight is simply the weight of one mole (6.022×10^23 atoms) of an element. (chemistry) the ratio of the atomic mass of an element to half the atomic mass of carbon-12. A relative atomic mass (also called atomic weight; symbol: A r) is a measure of how heavy atoms are. n the ratio of the average mass per atom of the naturally occurring form of an element to one-twelfth the mass of an atom of carbon-12., (Symbol) Ar (Abbrev) r.a.m (Former name) atomic weight. Definition of atomic-weight noun in Oxford Advanced American Dictionary. Can you spell these 10 commonly misspelled words? The numerator in the above formula gives the average atomic mass, which has a unit of the dalton or the unified atomic mass (u). ‘The sum of the atomic mass of the protons and neutrons determines the atomic mass or atomic weight of the nucleus.’ ‘Hydrogen is the lightest element, so it provides a convenient unit for measuring the relative atomic weights of the other elements.’ ‘It has an atomic number of 101 and an approximate atomic weight of 258.’ Atomic weight of an atom is the average mass of an atom of a particular element that is calculated using the relative abundance of isotopes (Isotopes are atoms that have the same number of protons but different numbers of neutrons.). Atomic number of chemical element in chemistry define the number by which the elements are arranged in the periodic table in order to increases electrons or protons of the neutral nucleus. The Atomic weight is defined as the average atomic mass of … Atomic Mass or Weight Definition Atomic mass, which is also known as atomic weight, is the average mass of atoms of an element, calculated using the relative abundance of isotopes in a naturally occurring element. atomic mass synonyms, atomic mass pronunciation, atomic mass translation, English dictionary definition of atomic mass. atomic weight synonyms, atomic weight pronunciation, atomic weight translation, English dictionary definition of atomic weight. Noun. The atomic weight is the average mass of the atoms of an element, calculated using the relative abundance of isotopes in a natural element. Meaning of atomic weight. Atomic mass is defined as the number of protons and neutrons contained in an individual unit of a substance. The periodic table of elements shows the atomic weight on the upper right. The picture below shows an example of Hydrogen and Sodium atoms. What does atomic weight mean? Atomic weight is the average mass of atoms of an element, calculated using the relative abundance of isotopes in a naturally-occurring element. Atomic weight, ratio of the average mass of a chemical element’s atoms to some … Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. In other words, a relative atomic mass tells you the number of times an average atom of an element from a given sample is heavier than one-twelfth of an atom of carbon-12. Standard Atomic Weights. wt. However, in the 1951 report, the committee added a footnote to sul-fur indicating that a variation factor (0.003) should be attached to its atomic-weight value to account for atomic-weight variations in naturally occurring sources of sulfur. Atomic weights are known as relative numbers, ratios to one standard atomic weight, without the dimensions associated with a unit. The value is given within brackets so that it's understood it's the nucleon count and not a natural value. Industry Dictionaries. Define atomic mass. Test Your Knowledge - and learn some interesting things along the way. What is Atomic Weight. Chemistry glossary Definition of atomic weight and examples. Prior to 1961, a unit of atomic weight was based on 1/16th (0.0625) of the weight of an oxygen atom. Atomic weight definition: the weight of one atom of an element expressed in atomic mass units : it is the average... | Meaning, pronunciation, translations and examples What is Atomic Weight. This is synonymous with atomic mass. What Is It Based On? Meaning of atomic weight. The standard atomic weight of an element is the value cited for atomic weight on the periodic table. 1922, Leicester F. Hamilton, Calculations of Analytical Chemistry, page 38: The equivalent weight of an element or compound is that weight equivalent in reactive power to one atomic weight of hydrogen. More from Merriam-Webster on atomic weight, Britannica.com: Encyclopedia article about atomic weight. Under the article Measure, (q.v.) The atomic weight of an atom depends on the atomic number and the number of neutrons present in the nucleus. Accessed 11 Jan. 2021. Atomic weight definition: the weight of one atom of an element expressed in atomic mass units : it is the average... | Meaning, pronunciation, translations and examples atomic weight - WordReference English dictionary, questions, discussion and forums. Since the mass of electrons is much smaller than that of protons and neutrons, the atomic mass is nearly identical to the mass number. Atomic Weight is the ratio of average mass of the atoms of a chemical element to some standard. Atomic mass indicates the size of an atom. What does atomic weight mean? “Atomic weight.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/atomic%20weight. What does atomic weight mean? ‘The sum of the atomic mass of the protons and neutrons determines the atomic mass or atomic weight of the nucleus.’ ‘Hydrogen is the lightest element, so it provides a convenient unit for measuring the relative atomic weights of the other elements.’ ‘It has an atomic number of 101 and an approximate atomic weight of 258.’ Gram-atomic weight definition is - the mass of one mole of an element equal in grams to the atomic weight —called also gram-atom. Definition of atomic-weight noun in Oxford Advanced Learner's Dictionary. Cambridge Dictionary +Plus Atomic weight Definition from Business & Finance Dictionaries & Glossaries. Please tell us where you read or heard it (including the quote, if possible). A quality in natural bodies, by which they tend towards the centre of the earth. Gram-atomic weight definition is - the mass of one mole of an element equal in grams to the atomic weight —called also gram-atom. atomic weight: [ wāt ] 1. heaviness; the degree to which a body is drawn toward the earth by gravity. Atomic Mass - Atomic mass is the mass of an atom or other particle, expressed in unified atomic mass units (u). Atomic weight is the average mass of atoms of an element, calculated using the relative abundance of isotopes in a naturally-occurring element. Learn a new word every day. The unit is dimensionless. It is the weighted average of the masses of naturally-occurring isotopes. Learn more. English Collins Dictionary - English Definition & Thesaurus. The number of positively charged particles is what they call the 'atomic number,' and these particles, together with the uncharged particles, make up the 'atomic weight. What made you want to look up atomic weight? Atomic weight definition is - the mass of one atom of an element; specifically : the average mass of an atom of an element as it occurs in nature that is expressed in atomic mass units. Relative Isotopic Mass - This is the ratio of the mass of a single atom to the mass of a unified atomic mass unit. 2. Its concept is fundamental as most of the chemical reactions occur according to the simple numeric relationships between the atoms. Define atomic weight. Prior to 1961, a unit of atomic weight was based on 1/16th (0.0625) of the weight of an oxygen atom. Likewise, we can calculate the atomic weight of any element considering the isotopes and their abundance. Pu 239 or as. Standard atomic weights are CIAAW recommended values for atomic weights applicable to all normal materials.Since 1902, the Commission regularly publishes critical evaluation of atomic weights of elements and below is the most recent definitive table of the standard atomic weights. The standard atomic weight of a chemical element is the weighted arithmetic mean of the … WEIGHT. Atomic definition, of, pertaining to, resulting from, or using atoms, atomic energy, or atomic bombs: an atomic explosion. Another issue is that "weight" implies a force exerted in a gravitational field, which would be measured in units of force, like newtons. ‘The sum of the atomic mass of the protons and neutrons determines the atomic mass or atomic weight of the nucleus.’ ‘Hydrogen is the lightest element, so it provides a convenient unit for measuring the relative atomic weights of the other elements.’ ‘It has an atomic number of 101 and an approximate atomic weight of 258.’ Atomic Weight. It is the ratio of the average mass per atom of an element from a given sample to 1/12 the mass of a carbon-12 atom. Usually carbon, with a weight of 12, is used as the basis. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Summary – Atomic Weight vs Atomic Mass. atomic weight Definition Englisch, atomic weight Bedeutung, Englisch Definitionen Wörterbuch, Siehe auch 'atomic age',atomic bomb',atomic clock',atomic cocktail', synonyme, biespiele It is the weighted average of the masses of natural isotopes. The periodic table of elements shows the atomic weight on the upper right. The picture below shows an example of Hydrogen and Sodium atoms. Enrich your vocabulary with the English Definition … The Nuttall Encyclopedia (0.00 / 0 votes)Rate this definition: Definition of Atomic Weight. Instead, atomic mass is expressed in unified atomic mass units (unit symbol: u). Learn more. The equivalent weight of an element or compound is that weight equivalent in reactive power to one atomic weight of hydrogen. Atomic weights (M) of atoms are related to the sum of the number of protons and neutrons.But this number physically corresponds to the actual weight of an atom. Definition von atomic weight im Englisch Englisch wörterbuch A term used to represent the mean relative atomic mass of an element in nature, as distinct from the relative atomic mass of a single isotope Former term for the more specific relative atomic mass. atomic mass definition: 1. the mass of a specific isotope of a particular chemical element, usually expressed in atomic…. 'All Intensive Purposes' or 'All Intents and Purposes'? WEIGHT. Most of Richards's atomic-weight determinations are so exact, that any variation there may be is measured in thousandths, i.e. The value cited for atomic weight on the atomic weight was based on the.. Free online English dictionary and Encyclopedia naturally-occurring element likewise, we can calculate the atomic weight '...: Encyclopedia article about atomic weight in the most comprehensive dictionary definitions resource on the periodic table naturally-occurring.... 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