What Is the Definition for Atomic Number
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noun
the number of positive charges or protons in the nucleus of an atom of a given element, and therefore also the number of electrons normally surrounding the nucleus. Abbreviation: at. no.; Symbol: Z
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QUIZ
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Also called proton number.
Origin of atomic number
First recorded in 1815–25
Words nearby atomic number
atomic heat, atomic hydrogen, atomicity, atomic mass, atomic mass unit, atomic number, atomic pile, atomic power, atomics, atomic spectrum, atomic structure
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021
How to use atomic number in a sentence
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There are "light" and "heavy" rare earths, based on their atomic number, and global demand for these metals is climbing.
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"Our members continue to face a number of challenges," she said.
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The number of dissenters though is unprecedented in the modern era.
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Starting under Theodore Roosevelt and Howard Taft, embassies headed by career diplomats increased in number.
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The number of diplomats was pitiful (45 appointees in 1860), as was the amount of money allocated to them.
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Jett sees this number as a marker of how much the president allows professionals to do the job.
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The country is well inhabited, for it contains fifty-one cities, near a hundred walled towns, and a great number of villages.
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We had six field-pieces, but we only took four, harnessed wit twice the usual number of horses.
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There are a number of bacilli, called acid-fast bacilli, which stain in the same way as the tubercle bacillus.
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Five of the number had studied with Liszt before, and the young men are artists already before the public.
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I do not think the average number of passengers on a corresponding route in our country could be so few as twenty.
British Dictionary definitions for atomic number
noun
the number of protons in the nucleus of an atom of an element Abbreviation: at. no. Symbol: Z Also called: proton number
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Medical definitions for atomic number
n.
The number of protons in an atomic nucleus; it indicates the position of an element in the periodic table.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Scientific definitions for atomic number
The number of protons in the nucleus of an atom. In electrically neutral atoms, this number is also equal to the number of electrons orbiting about the atom's nucleus. The atomic number of an element determines its position in the Periodic Table, and is usually denoted by the letter Z and written as a subscript before an element's symbol, as in 92U.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Cultural definitions for atomic number
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
What Is the Definition for Atomic Number
Source: https://www.dictionary.com/browse/atomic-number
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