Question

4. Match the following:
Element
a.
Ar
No. of Neutron
i. 7
ii.21
iii. 8
iv. 22
d. IAN​

Answer 1

Answer:

22

Explanation:

to find the no. of neutrons we subtract the rounded figure of at.no by the no. of protons(at.no.)

at. mass - at.no(no. of protons)

1.so mass of argon is 40(estimated as actual is 39.9)

2.at.no. is 18

therefore no. of neutrons is 22.