ch 23 unit 3 physical science

Which of the following would best describe the characteristics of the material formed? with carbon and oxygen

A non-conducting material with low melting and boiling points, likely liquid or gas at room temperature

Dispersion forces are stronger than covalent bonds.

false

The forces between the N2 molecules in a container of N2 are very strong.

false

Which of the following set of properties is most likely those associated with methane, a covalently bonded compound?

gas at room temperature, colorless, does not conduct electricity when solid

How would you describe the melting point of a substance formed by a substance containing molecular ions?

high

When are molecular conductors of electricity?

When they combine with metals and are then melted or dissolved

true or false. electrons or ions are free to move in solid state in.. 1. covalent 2. ionic 3. metallic

1. false 2. false 3. true

true or false. bonds are long range 1. covalent 2. ionic 3. metallic

1. false 2. true 3. true

true or false. bonds are localized 1. covalent 2. ionic 3. metallic

1. true 2. false 3. false

true or false. bonds arise from electrostatic interactions in.. 1. covalent 2. ionic 3. metallic

1. true 2. true 3. true

true or false. energy levels are widely spaced in.. 1. covalent 2. ionic 3. metallic

1. true 2. true 3. false

Ammonium nitrate (NH4NO3), a common fertilizer, is an ionically bonded substance involving two polyatomic ions, ammonium (NH4+) and nitrate (NO3-). Ammonium nitrate dissolves well in a polar solvent such as water. Which of the following statements best describes what happens when this fertilizer dissolves in water?

The compound breaks up into the two oppositely charged ions. The ions do not break apart.

What best describes how the oxygen molecules would behave if mixed with water?

They would dissolve poorly or not at all because they are not polar.

When do polyatomic ions form crystals?

When they combine with metal atoms to form salts. and When they combine with other non-metal atoms.

Which of the following pairs would you expect to be covalently bonded? Select one: a. Co and Al b. P and Ca c. S and Br d. Ar and Cl

c. S and Br

What type of bond would exist between the carbon and the oxygen?

covalent

if you see the word molecule, what type of bond is present

covalent

Rank the following according to their strength, weakest first, strongest last. dipole-dipole interactions dispersion forces covalent bonding hydrogen bonding

dispersion forces, dipole-dipole interactions, hydrogen bonding, covalent bonding

Hydrogen bonding between molecules increases melting and boiling points.

true

N2 has a triple bond and is a gas at room temperature. True or False: The triple bond is a very strong bond.

true

The molecule will be more electronegative (negative)...

up and to the right