How many electrons will a calcium atom (Ca) lose in order to get a noble gas configuration?
Calcium atoms will lose two electrons in order to achieve the noble gas configuration of argon. A neutral calcium atom has 20 electrons, while a calcium atom that has lost two electrons will have 18 electrons, and a neutral argon atom also has 18 electrons.
A neutral calcium atom,
electron configuration of
An calcium cation,
A neutral argon atom,