Element that corresponds to atomic number 18?

2 Answers
Feb 2, 2018



Atomic number is the top number on the periodic table

Feb 3, 2018

Argon #(Ar)#


Have a look at the periodic table. Then, look at the top number of each element, and that is the atomic number. When you reach element number #18# on the periodic table, there should be an element with a symbol #Ar#, and it denotes the element argon.

Argon is an unreactive noble gas.