ATOMS Flashcards
1
Q
Subatomic particles of an atom
E
P
N
A
Electron
Proton
Neutron
2
Q
Who discovered Electron?
A
English physicist Sir Joseph Thompson
3
Q
Who discovered Proton?
A
German Physicist E. Goldstein
4
Q
Who discovered Neutron?
A
English physicist Ernest Rutherford
5
Q
Atomic number =
A
Number of protons
6
Q
Atomic mass or Mass number (A) =
A
Protons + Neutron
7
Q
No. of electrons =
A
No. of protons
8
Q
No. of neutron =
A
Atomic Mass - Proton
