Matter properties

What subatomic particle has a positive charge?

• Proton

• Neutron

• Electron

• Nucleus

Which of the following is a mixture?

• Pure water

• Table salt (NaCl)

• Air

• Iron filings

What is the process called when a gas changes directly into a solid?

• Evaporation

• Condensation

• Sublimation

• Freezing

What is the atomic number of an element?

• The number of neutrons in the nucleus

• The number of electrons in the outermost shell

• The number of protons in the nucleus

• The sum of protons and neutrons in the nucleus

What are the three states of matter?

• Solid, gas, liquid

• Liquid, gas, plasma

• Solid, liquid, plasma

• Gas, plasma, solid

What is the charge of a neutron?

• Positive

• Negative

• Neutral

• Variable

What happens to a solid when it is heated to its melting point?

• It expands

• It contracts

• It changes to a liquid

• It changes to a gas

Which of the following elements is a metal?

• Carbon

• Oxygen

• Iron

• Sulfur

Where are electrons located in an atom?

• Nucleus

• Proton

• Orbitals around the nucleus

• Neutron

What is the smallest particle of an element that retains its properties?

• Molecule

• Atom

• Compound

• Electron