Question

Which of the following elements will form divalent long?
Aluminium, barium, potassium, hydrogen, zinc, calcium, Beryllium​

Answer 1

ANSWER

(A) Fluorine with electronic configuration 1s  

2

2s  

2

p  

5

 will form a most stable monovalent anion.

(B) Oxygen with electronic configuration 1s  

2

2s  

2

p  

4

 will form a most stable bivalent anion.

(C) Chlorine with electronic configuration 1s  

2

2s  

2

p  

6

3s  

2

3p  

5

 will form a most stable monovalent anion.

(D) Nitrogen with electronic configuration 1s  

2

2s  

2

p  

3

 will form a most stable trivalent anion.

Answer 2

Answer:

Which of the following elements will form divalent long?

Aluminium, barium, potassium, hydrogen, zinc, calcium, Beryllium

=> Aluminium