Atomic Theory

Who discovered the electron

• Dalton

• Thomson

• Rutherford

• Bohr

What did Rutherford discover in his experiment?

• nucleus

• electrons

• neutrons

In whose model are atoms are imagined as tiny balls?

• Dalton

• Thomson

• Rutherford

• Bohr

What does atom mean?

• small

• visible

• indivisible (cannot be cut)

• particle

7) Rutherford’s “gold-foil” experiment using alpha particle scattering concluded that

• the center of the atom is empty

• atomic mass is spread over the whole atom

• the center of the atom has a negative charge

• most of the atom is empty

In whose model are atoms are imagined as the solar system?

• Dalton

• Thomson

• Rutherford

• Bohr

• Cloud Model

Who created the plum pudding model of the atom?

• Rutherford and the plums were protons

• Rutherford and the plums were electrons

• Thomson and the plums were protons

• Thomson and the plums were electrons

Who ran the gold-foil experiment?

• Rutherford

• Thomson

• Democritus

• Dalton

This is an example of which model of the atom?

• Rutherford's Model

• Plum Pudding Model

• Atomic Model

• Bohr's Model

What are electrons?

• an atom’s central regions, which is made up of protons and neutrons

• subatomic particles that have negative charges

• subatomic particles that have neutral charges

• subatomic particles that have positive charges