Unit 2 Test True/False

Substances can change physical state when heated or cooled, or when the energy of the particles in increased or decreased.

• True

• False

The melting point is the point at which a liquid changes into a gas and the boiling point is the point at which a solid changes into a liquid

• True

• False

Two methods of crystallization are allowing a solvent to evaporate and placing a seed crystal in a supersaturated solution.

• True

• False

The four main types of lattice structures are giant atomic, giant ionic, giant metallic and molecular lattices.

• True

• False

Cohesion is the intermolecular force of attraction between molecules within different substances, while adhesion is the intermolecular force of attraction between molecules within the same substance.

• True

• False

Avogadro's law states that equal volumes of gases at the same temperature and pressure contain the same number of molecules.

• True

• False

An ideal gas behaves in an ideal way

• True

• False

Stp stands for super-trans-phosphorus

• True

• False