Four elements A, B, C and D have atomic numbers 12,13,14 and 15 respec

1.	Four elements A, B, C and D have atomic numbers 12,13,14 and 15 respectively.Answer the following questions giving reasons :(i) What is the number of valence electrons and valency of D ?(ii) Which of them will have largest atomic radii ?(iii) Which of these elements will form the most basic oxide ?
Answer» (i) Valence electrons,in 'D'. = 5 and Valency of 'D' =3. (ii) 'A' will have largest atomic radii because atomic radius decreases across a period from left to right. (iii) 'A' will form the most basic oxide as it is most metallic.

Four elements A, B, C and D have atomic numbers 12,13,14 and 15 respectively.Answer the following questions giving reasons :(i) What is the number of valence electrons and valency of D ?(ii) Which of them will have largest atomic radii ?(iii) Which of these elements will form the most basic oxide ?

Answer»

(i) Valence electrons,in 'D'. = 5 and Valency of 'D' =3.

(ii) 'A' will have largest atomic radii because atomic radius decreases across a period from left to right.

(iii) 'A' will form the most basic oxide as it is most metallic.