Question

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 above said element.

Answer 1

(i) Two elements of group 1 are Na, K / Sodium, potassium.

Electronic configurations Na = 2,8,1;K=2,8,8,1

(ii) Similarity : Both have one valence electron /One electron in outermost shell.

(iii) Oxide - Na₂O/K₂O.