By: Kaylee Henderson


A=P=E (Atomic Number=number of protons= number of electrons)


P+N=M (Number of protons+ number of neutrons = Atomic Mass)


M-A=N (Atomic mass- Atomic number= number of neutrons)


Atomic Mass- 39.948

Atomic Number- 18

Element Symbol- Ar

Element name- Argon

Facts about the element Argon

The eighteenth heaviest element

Argon is an inert (doesn't interact with other elements to form compounds) odorless and colorless gas.

Argon got its name from the Greek word " lazy " because how little it reacts to form compounds.

Argon in Its purest form

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How electrons benefit the element

The element argon's electrons are arranged in the outer shell, therefore the element Argon has no ability to attract or lose electrons. This results in having no Electronegativity value.


Argon is a chemical element of the atomic number 18, an inert gaseous element of the noble gas group. Argon is the most common noble gas , making up almost one percent of the Earth's atmosphere. The element Argon was discovered by Sir William Ramsay a Scottish chemist and Lord Rayleigh an English chemist in 1894.