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- 1. Multiple Choice
Why are atoms electrically neutral?
They have the same number of protons and neutrons which are both found in the nucleus.
They have the same number of protons and electrons which are both found in the nucleus.
They have the same number of protons and electrons which are both found outside the nucleus of atoms.
The number of protons inside the nucleus is equal to the number of electrons outside the nucleus of an atom.
- 2. Multiple Choice
Which of the subatomic particles is the lightest?
Electrons
Protons
Neutrons
Nucleus
- 3. Multiple Choice
Which of the subatomic particles makes the nucleus positive?
Electrons
Protons
Neutrons
Nucleon
- 4. Multiple Choice
He is the scientist who studied how alpha particles interact with a piece of very thin gold foil.
Ernest Rutherford
Eugen Goldstein
John Dalton
Sir William Crookes
- 5. Multiple Choice
Which statement is NOT TRUE about the nucleus of an atom?
It is positively charged.
It is the tiny central part of the atom.
It consists of protons and electrons.
It is composed of neutrons and protons.
- 6. Multiple Choice
The Cathode Ray Tube was the instrument used in the discovery of ____________________.
Electron
Nucleus
Neutron
Proton
- 7. Multiple Choice
Rutherford’s alpha scattering experiment with gold foil demonstrated the existence of what part of the atom?
Electron
Nucleus
Neutron
Proton
- 8. Multiple Choice
Which two particles would be attracted to each other?
Electrons and protons
Electrons and neutrons
Protons and neutrons
All particles are attracted to each other
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