Question

3
The following table shows the position of five elements A, B, C, D and E in
the modern periodic table.
1
2
3 to 12
13
14
15
16
17
18
Group-
Period
2.
A
B
C
ID
3
Answer the following giving reasons:
Name the element which is a non-metal with valency three.
Name the element which forms only covalent compounds.
(iii) Compare the atomic size of A, B and C.​

Answer 1

Answer:

1. an element placed in the group 15 have the valency of three
2. an element placed in the group 14 will only form covalent compounds, here it is carbon of 2 period as mentioned in the question.
3. प्लीज राइट थे क्वेश्चन properly I can't understand third part or send photo