Question

31. Study the following table in which position of six elements A, B, C, D, E are shown as
they are in the Modern Periodic Table:
3
Group
1
2
3 to 12
13
14
15
16
17
18
Period
с
2.
B
A
D
F
3
On the basis of above table, answer the following questions:
(a) Name the element which forms only covalent bond.
(b) Name the element which is a metal with valency three.
(c) Name the element which is a non-metal with valency three.
(d) Out of D and E, which is bigger in size and why?​

Answer 1

Answer:

a) Group 13 element which forms covalent bond only