Question

Write the correlation: Sodium : (2,8,1) :: Chlorine :___________

Answer 1

Answer:

chlorine is the 17th element so

atomic number = 17

electronic configuration =2, 8, 7

valency=1

Answer 2

Answer:

Correlation between Sodium and Chlorine is:

Sodium : (2, 8, 1) :: Chlorine : (2, 8, 7)

Explanation:  

• The $atomic$ number of the sodium = 11

        The electronic configuration of the sodium is :

        Na : 1s² 2s² 2p⁶ 3s¹

        Sodium has two electrons in first subshell. Then eight electrons in

        second subshell and then one electron in third subshell.

        Therefore, Sodium : (2, 8, 1)

• The $atomic$ number of chlorine = 17

        The electronic configuration of the Chlorine is:

        Cl :   1s² 2s² 2p⁶ 3s² 3p⁵

        Chlorine has two electrons in first subshell then eight electrons in

       second subshell and then seven electrons in third subshell.

       Therefore, Chlorine : (2, 8, 7)