Understanding Subatomic Particles

Which of the following particles is not a building block of all atoms?

• Photon

• Electron

• Neutron

• Proton

Who proposed the atomic theory that led to the acceptance of atoms as the fundamental unit of matter?

• John Dalton

• Aristotle

• Plato

• JJ Thompson

What experiment did JJ Thompson perform to prove the existence of subatomic particles?

• Double-slit experiment

• Oil drop experiment

• Cathode ray tube experiment

• Gold foil experiment

What is the approximate mass of a proton in atomic mass units (amu)?

• 2 amu

• 1.5 amu

• 1 amu

• 0.0005 amu

Which subatomic particle has a mass that is nearly negligible compared to others?

• Proton

• Neutron

• Electron

• Photon

What is the charge of a neutron?

• Variable

• Neutral

• Negative

• Positive

Why do most atoms not have an overall charge?

• They have no neutrons

• They have equal numbers of protons and electrons

• They have more protons than electrons

• They have more electrons than protons

What defines an element in terms of subatomic particles?

• Number of neutrons

• Number of atoms

• Number of protons

• Number of electrons

What are isotopes?

• Atoms with the same number of protons and neutrons

• Atoms with the same number of electrons but different numbers of protons

• Atoms with the same number of neutrons but different numbers of protons

• Atoms with the same number of protons but different numbers of neutrons

Which isotope of hydrogen has one proton and two neutrons?

• Protium

• Deuterium

• Tritium

• Hydronium