What is the definition of an atomic number? An atomic number of an element is the number of protons in all the atoms of that element. Atomic numbers are always whole numbers greater than zero, such as 1,2,3... since an atom cannot have a fractional number of protons. ...
“Atomic number.”Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/atomic%20number. Accessed 25 May. 2025. Copy Citation Share Kids Definition atomic number noun :a number that is characteristic of a chemical element and represents the number of protons ...
any number of times while amount is mainly used with mass nouns. annual amount of rainfall a substantial amount of money The use of amount with count nouns has been frequently criticized; it usually occurs when the number of things is thought of as a mass or collection glad to furnish...
Atomic number definition: 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. See examples of ATOMIC NUMBER us
atomic number noun /əˌtɒmɪk ˈnʌmbə(r)/ /əˌtɑːmɪk ˈnʌmbər/ (chemistry) the number of protons in the nucleus (= centre) of an atom of a particular chemical element. Elements are placed in the periodic table according to their atomic numbers....
Define atomic number 53. atomic number 53 synonyms, atomic number 53 pronunciation, atomic number 53 translation, English dictionary definition of atomic number 53. Noun 1. atomic number 53 - a nonmetallic element belonging to the halogens; used especial
atomic number 10- a colorless odorless gaseous element that give a red glow in a vacuum tube; one of the six inert gasses; occurs in the air in small amounts Ne,neon chemical element,element- any of the more than 100 known substances (of which 92 occur naturally) that cannot be separat...
atomic number 14 - a tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth's crust; occurs in clay and feldspar and granite and quartz and sand; used as a semiconductor in transistors Si, silicon chemical element, element - any of the more than 100 ...
Because protons are units of matter, atomic numbers are always whole numbers. At present, they range from 1 (the atomic number of hydrogen) to 118 (the number of the heaviest known element). As more elements are discovered, the maximum number will go higher. Theoretically, there is no maxi...
Atomic Number Examples Theatomic numberofhydrogenis 1; the atomic number ofcarbonis 6, and the atomic number of silver is 47: any atom with 47 protons is an atom of silver. Varying the number of neutrons in an element changes its isotopes while changing the numbers of electrons makes it ...