Structure of Atoms and Molecules Quiz

What are molecules made up of?

• Atoms

• Protons

• Neutrons

• Electrons

Which of the following statements is true about atoms?

• Atoms are solid objects.

• Atoms are made up of molecules.

• Atoms consist of even smaller particles.

• Atoms have no internal structure.

What charge do protons have?

• Negative (-)

• Neutral (0)

• Positive (+)

• No charge

Based on the diagram, which particle orbits around the nucleus?

• Proton

• Neutron

• Electron

• Molecule

Explain why atoms are not considered solid, using evidence from the electron theory.

• Atoms are made of molecules.

• Atoms are made of protons only.

• Atoms consist of even smaller particles, such as protons, neutrons, and electrons.

• Atoms are always in liquid form.

Which subatomic particles in an atom have equal numbers and opposite charges, resulting in the atom being electrically neutral?

• Protons and neutrons

• Electrons and neutrons

• Protons and electrons

• Neutrons and ions

What is the term used for an atom that has gained or lost an electron and thus has a net electrical charge?

• Molecule

• Ion

• Isotope

• Compound

If an atom has more electrons than protons, what is its overall charge?

• Positive

• Negative

• Neutral

• Zero

Explain why atoms are usually electrically neutral. Use evidence from electron theory to support your answer.

• Atoms have more protons than electrons.

• Atoms have equal numbers of protons and electrons, which cancel each other’s charges.

• Atoms have only neutrons in the nucleus.

• Atoms have no charged particles.

Which part of the atom contains the protons?

• The electron cloud

• The central core (nucleus)

• The outer shell

• The orbit