‘Various numbers are used to define nuclei: the atomic number, Z, is the number of protons, while the mass number is the sum of the atomic number and the number of neutrons, N.’ ‘The mass number gives you the total number of protons and neutrons in the nucleus of that element.’ Mass number, in nuclear physics, the sum of the numbers of protons and neutrons present in the nucleus of an atom.The mass number is commonly cited in distinguishing among the isotopes of an element, all of which have the same atomic number (number of protons) and are represented by the same literal symbol; for example, the two best known isotopes of uranium (those with mass numbers … noun mass number the number of neutrons and protons in the nucleus of an atom: the approximate mass of a given nucleus is obtained by multiplying the mass number by the fundamental unit of mass, 1.6605 × 10-24 grams (1⁄12 the mass of C12 atom) 0; noun mass number (physics) The total number of protons and … no. For example, the most common … Mass Number. mass definition: 1. having an effect on or involving a large number of people or forming a large amount: 2. a large…. Definition of mass number in the Definitions.net dictionary. Definition of mass-number noun in Oxford Advanced Learner's Dictionary. :20 Mass numbers are always whole numbers with no units. ; Symbol: Z See more. An element’s mass number (A) is the sum of the number of protons and the number of neutrons. The value of A is calculated by summing the number of protons and neutron in the nucleus of … This page provides all possible translations of the word mass number in almost any language. The mass number is placed before and above the elemental symbol, thus 238 U. Definition. The mass number (symbol: A) of an atom is the sum of the number of protons and the number of neutrons in the nucleus. Meaning of mass number. Information and translations of mass number in the most comprehensive dictionary definitions resource on the web. n. The sum of the number of neutrons and protons in an atomic nucleus. What is Atomic Number – Definition. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. mass number (A) the number of nucleons (protons plus neutrons) in the atom of a nuclide; generally indicated by a superscript preceding the symbol of a chemical element (e.g., 131 I), denoting a specific isotope. Atomic mass number synonyms, Atomic mass number pronunciation, Atomic mass number translation, English dictionary definition of Atomic mass number. Periodic Table ... where A is called the mass number. English Wikipedia - The Free Encyclopedia. American Heritage® … What does mass-number mean? ber Would you like to know how to translate mass number to other languages? The mass number (A), also called atomic mass number or nucleon number, is the total number of protons and neutrons (together known as nucleons) in an atomic nucleus. Isotopic abundance from the mass spectrometer. How to use mass in a sentence. Atoms are composed of electrons, protons, and neutrons.Protons and neutrons together make the nucleus of an atom. Also called nucleon number . Mass number is denoted as A. (ii) Mass number: It is the sum of the number of neutrons and the number of protons. :20 The mass number is different for each isotope of a chemical element.. We write a mass number after an element's name or as a superscript to the left of an element's symbol. Consider Table below which shows data from the first six elements of the periodic table. Mass number Definition from Encyclopedia Dictionaries & Glossaries. This is not the same as the atomic number (Z) which denotes the number … Mass Number Explanation. Learn more. Mass number is also called as atomic number or nucleon number. The mass number is written either after the element name or as a … Mass Number: The mass number of an atom is the total number of nucleons (i.e. In the physical scale of atomic mass or weight in chemistry, the natural oxygen atom (relative weight 16) is taken as the reference. This approximation of mass can be used to easily calculate how many neutrons an element has by simply subtracting the number … Notation and Formula. : The mass number gives you the total number of protons and neutrons in the nucleus of that element. The mass number is different for each different isotope of a chemical element. It determines the atomic mass of atoms The mass number is different for each different isotope of a chemical element. (noun) The mass number (A), also called atomic mass number or nucleon number, is the total number of protons and neutrons (together known as nucleons) in an atomic nucleus. Looking for definition of mass number? We use cookies to enhance your experience on our website, including to provide targeted advertising and track usage. Main Difference – Atomic Number vs Mass Number. A number which may be increased or diminished at pleasure. The mass number, also called atomic mass number or nucleon number, is the total number of protons and neutrons in an atomic nucleus. Define Atomic mass number. Also called nucleon number . Isotopes have mass numbers that differ by at least one atomic mass unit and so are easily differentiated. Define mass number by Webster's Dictionary, WordNet Lexical Database, Dictionary of Computing, Legal Dictionary, Medical Dictionary, Dream Dictionary. The mass spectrometer is a very sensitive instrument and can detect particles with very small differences in relative mass. Mass definition is - the liturgy of the Eucharist especially in accordance with the traditional Latin rite. number of protons and neutrons combined) in its nucleus. 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