A-monatomic-ion-with-a-charge-of-2-has-an-electronic-configuration-of-1s22s22p6-chemistry-homework-help
A monatomic ion with a charge of -2 has an electronic configuration of 1s22s22p6.
This ion is a(n) .
What is the chemical symbol of the noble gas this ion is isoelectronic with? .
What is the formula of the ion?