Question

If the number of proton is 11 and number of
neutron is 12, find atomic number and mass.
number
​

Answer 1

Answer:

Mass no. is the sum of no. of protons and neutrons in an atom while atomic no. is total no. of protons in an atom.

Atomic no. = 11

Mass no. = (12+11)= 23

And the element is Sodium.