Question

4. Match the following:
Elements to its number of neutrons​

Answer 1

Answer:

a- iv , b- iii, c- ii, d- i

Answer 2

Answer:

see the upper value is the atomic mass , where as the lower value in atomic number

SIMPLY, atomic number means number of proton/ electron and mass no is : No of Neutron + No of proton

this way find the number of neutron,

Explanation:

EXAMPLE :: In argon (Ar) ,

ATOMIC NUMBER = 18

ATOMIC MASS = 40

NUMBER OF NEUTRONS = 40 - 18 = 22

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