Atomic Structure and Properties Quiz

What is the smallest unit of matter that retains the identity of a substance?

• Electron

• Proton

• Atom

• Molecule

Who proposed the atomic theory of matter in 1803?

• Ernest Rutherford

• Joseph John Thompson

• John Dalton

• Niels Bohr

Which experiment led to the discovery of the electron?

• Quantum mechanical model

• Cathode ray experiment

• Alpha scattering experiment

• Gold foil experiment

What did Rutherford's gold foil experiment discover?

• Electron

• Proton

• Nucleus

• Neutron

In Bohr's atomic model, electrons are found in:

• Between protons and neutrons

• Inside the nucleus

• Specific energy levels

• Random orbits

What is the charge of a neutron?

• Positive

• Neutral

• Negative

• Variable

What is the process called when an atom loses or gains electrons?

• Ionization

• Isotopization

• Neutralization

• Polarization

What is a positive ion called?

• Neutron

• Isotope

• Cation

• Anion

Which of the following is an isotope of hydrogen?

• Deuterium

• Helium

• Lithium

• Beryllium

What determines the chemical properties of an atom?

• Number of electrons

• Number of protons

• Number of neutrons

• Mass number