Reviewer Guide for Chemistry Final Exam

Which state of matter has a definite volume but takes the shape of its container?

• Solid

• Liquid

• Gas

• Plasma

Which of the following is a pure substance?

• Air

• Saltwater

• Sodium chloride

• Granite

Which of the following is a chemical property?

• Boiling point

• Density

• Reactivity with acid

• Color

Which process represents a chemical change?

• Melting ice

• Dissolving sugar in water

• Burning wood

• Crushing a can

Which observation is not evidence of a chemical change?

• Formation of a precipitate

• Change in color

• Melting

• Evolution of gas

Who proposed that atoms are indivisible and indestructible?

• Dalton

• Thomson

• Rutherford

• Bohr

Which of the following statements about isotopes is true?

• Isotopes have the same number of protons but different numbers of electrons.

• Isotopes have the same number of protons but different numbers of neutrons.

• Isotopes have different atomic numbers but the same mass numbers.

• Isotopes have different chemical properties.

Which particle has the least mass?

• Proton

• Neutron

• Electron

• Alpha particle

What happens during beta decay?

• A neutron becomes a proton and emits an electron.

• A proton becomes a neutron and emits a positron.

• A nucleus emits two protons and two neutrons.

• A nucleus emits energy without particle loss.

Which of the following properties of a substance can be observed without changing its chemical composition?

• Combustibility

• Flammability

• Melting point

• Reactivity with water