Question

Match the atomic numbers 4, 8, 10, 15 and 19 with each of the following:
a) Element which can form trivalent bond
b) An element with 4 shells
c) Element with 6 valence electrons
d) Element which does not form ion

Answer 1

Answer:

a- 15

b- 19

c- 8

d-10

Explanation:

a- atomic no.15 that is phosphorus has valency 3 that is trivalent

b- atomic no.19 that is potassium has 4 shells that is 2,8,8,1

c-atomic no.8 that is oxygen with configuration 2,6.....

c-atomic no.10... configuration 2,8 complete octate... that is neon so will not form kon due to stability ...and noble gas configuration

Answer 2

15

19

8

10

Hope it helps