Definition of atomic number 18 in the Definitions.net dictionary. Meaning of atomic number 18. What does atomic number 18 mean? Information and translations of atomic number 18 in the most comprehensive dictionary definitions resource on the web. The atomic number of am element is determined by its number of either electrons or protons, hence here, it is 18. Therefore the element must be argon which the isotope has mass number 38, as there. Definition of atomic number 18 in the Definitions.net dictionary. Meaning of atomic number 18. What does atomic number 18 mean? Information and translations of atomic number 18 in the most comprehensive dictionary definitions resource on the web. Atomic mass: The mass of an atom is primarily determined by the number of protons and neutrons in its nucleus. Atomic mass is measured in Atomic Mass Units (amu) which are scaled relative to carbon, 12 C, that is taken as a standard element with an atomic mass of 12. Atomic number group 18 elements list. Which elements have group number of 18? List the atomic symbol and element names.
Also found in: Thesaurus.
| Noun | 1. | atomic number 18 - a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere Ar, argon chemical element, element - any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter argonon, inert gas, noble gas - any of the chemically inert gaseous elements of the helium group in the periodic table air - a mixture of gases (especially oxygen) required for breathing; the stuff that the wind consists of; 'air pollution'; 'a smell of chemicals in the air'; 'open a window and let in some air'; 'I need some fresh air' |
Atomic Number 18
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Element With Atomic Number 17
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Atomic Number 18 Element
Atomic Number 186