AP Chemistry Unit 2

network atomic solids

- stronger than IMFs but weaker than ion-ion- lattice points occupied by atoms- held together by covalent bonds- hard, high melting point- poor conductor of heat and electricity

At room temperature I2(s) is a molecular solid. Which of the following provides a characteristic of I2(s) with a correct explanation?

It is not a good conductor of electricity because its valence electrons are localized in bonding and nonbonding pairs

Boyle's Law

P1V1=P2V2

Which of the following statements is true about gasses?

The volume of a gas is always equal to the volume of the enclosing container.

A certain crystalline substance that has a low melting point does not conduct electricity in solution or when melted. This substance is likely to be

a molecular solid

Of the following, the best explanation for the fact that most gases are easily compressed is that the molecules in a gas

are relatively far apart

Which of the following physical properties would tell you about an element's mass per unit volume ratio?

density

Resistance of a material being scratched in known as _____.

hardness

All atoms of the same element:

have the same number of protons

Hardness is directly related to:

strength of chemical bonds