Answer:
The answer to your question is given below.
Explanation:
Sodium (Na) is a group 1 element because it has 1 electron in it's outermost shell.
Sodium ion (Na+) is formed when sodium atom (Na) lose it's outermost electron to attain the octet configuration of the noble gas element.
This can further be seen from the equation given below:
Na —> Na+ + e
Thus, we can represent the above in electronic configuration form as follow:
Na (11) => 1s² 2s²2p⁶ 3s¹
Na+ (10) => 1s² 2s²2p⁶
