Name any two elements of group one and write their electronic configurations. What similarity do you observe in their electronic configurations? Write the formula of oxide of any of the aforesaid element.

Solution:
Two elements of group 1 along with their electronic configuration are:
Lithium (₃Li) = 2,1 [1s²2s¹]
Sodium (₁₁Na) =2,8,1 [1s²2s²2p⁶3s¹]
Similarities in both elements are that they have the same number of valence electrons i.e 1

Li forms Li₂O (lithium oxide)
Na forms Na₂O (sodium oxide)