Question

Statement 1: Lithium belongs to group 1 of the periodic table.​
Statement 2: Lithium and beryllium belong to the same period.​

Answer 1

Atomic number of Lithium = 3
Electronic configuration: 2, 1
Period number = no. of shells = 2
Group number = no. of valence electrons = 1
So, statement 1 is correct.

Atomic number of Beryllium = 4
Electronic configuration: 2, 2
Period number= no. of shells = 2
Thus, Lithium and Beryllium belong to the 2nd period.
So, statement 2 is also correct.

Therfore, both statements are correct.