The number of valence electrons for each atom is the total number of electrons in the outermost shell (n). The number of valence electrons for Argon is 5, which is also the number of electrons in its first energy level.
The sum of the atomic numbers (Z) in a compound must equal the charge on the ion. For example, if you have a compound that contains an Ar atom and an O atom, then ZAr=18+16=34 and ZO=16+16=32. Therefore, this compound must contain 2 Ar atoms and 3 O atoms.
Ar is a noble gas, so it doesn’t form any compounds. It is a member of the group 18 element on the periodic table, and it has an atomic number of 18.
The valence electrons in ar are 2s2p3.
The outer shell of an atom consists of electrons that are unpaired or paired with each other. The number of electrons in these shells is called the “electronic configuration.” The electronic configuration for ar is 2s2p3, which means there are two valence electrons in the 2s orbital and three additional valence electrons in p orbitals.
Last modified: September 21, 2022