Question

atomic number of Aluminium is 13 and mass number is 27 calculate the number of electrons protons and neutrons in its atom

Answer 1

13 protons and 14 neutrons.

Answer 2

Atomic No.(Z)=13
Mass No.(A)=27
No. of protons=Z=13
No. of electrons=No. of protons=13
No. of neutrons =A-Z=27-13
So,no. of neutrons=14