Which of the following relation is correct?
I. Atomic number = Number of protons + Number of electrons
II. Mass number = Number of protons + Number of neutrons
1
Both I and II
2
Only II
3
Neither I nor II
4
Only I
Which of the following relation is correct?
I. Atomic number = Number of protons + Number of electrons
II. Mass number = Number of protons + Number of neutrons