1
He was the first one in talking about atomic nucleus.
2
Atomic particle with negative charge.
3
Atoms of the same element with the same atomic number and different mass number.
4
He proposed the plum pudding model of the atom.
5
Region of the atom where electron is likely to be.
6
Atomic particle without charge.
7
Atomic particle with positive charge.
8
He was the first one in talking about energy levels.
