QUESTION 2

Which components of the atom have a positive charge?

protons

electrons

neutrons

All components have a positive charge.

QUESTION 3

Which component of the atom has the least mass?

protons

electrons

neutrons

All are the same size.

QUESTION 4

The identity of an element depends on the number of

protons in the atom.

electrons in the atom.

neutrons in the atom.

protons and neutrons in the nucleus.

QUESTION 5

What did Rutherford contribute to the model of the atom?

the electron

the nucleus

the neutron

the proton