How does the number of valence electrons vary on moving from left to r

1.	How does the number of valence electrons vary on moving from left to right : in the first period of the periodic table ? (if) in the second period of the periodic table ?
Answer» (i) The number of valence electrons increases from 1 to 2 in the 1st period of the periodic table. (ii) The valence electrons increase from 1 to 8 in the 2nd period of the periodic table.

How does the number of valence electrons vary on moving from left to right : in the first period of the periodic table ? (if) in the second period of the periodic table ?

Answer»

(i) The number of valence electrons increases from 1 to 2 in the 1st period of the periodic table.

(ii) The valence electrons increase from 1 to 8 in the 2nd period of the periodic table.