← Physics (0625)
Q1 / 5
The nuclear model of the atom
Foundation
2 marks
What is meant by the atomic number and mass number of an element?
A
Atomic number Z = number of protons; Mass number A = protons + neutrons
B
Atomic number = neutrons; Mass number = protons only
C
Mass number = number of electrons; Atomic number = protons + neutrons
D
Both numbers are equal for any neutral atom
Need a hint?