How many core electrons does argon have?

Answer 1

Argon has 10 core electrons. Subtract the amount of valence electrons from your total amount of electrons. 18-8= 10

Answer 2

Argon has 18 core electrons. This is because the atomic number of argon is 18, and the number of core electrons is equal to the number of electrons in the nearest noble gas configuration, which in this case is neon (10 core electrons), plus the number of electrons in the next energy level, which is 8 for argon.