Answer:
- SR: no. of protons=38
no. of neutron=51
2. Cr: no. of protons= 24
no. of neutron=28
3. S: number of protons=16
number of neutrons =16
4. BR : number of proton=35
number of neutron =46
Explanation:
In the given questions;
the numerator is atomic mass and in denominator there is atomic number.
