Unit 4: Bonding (Short Response)

Question 1

State the type of chemical bonding in a sample of CaO.

Answer 1

ionic

Question 2

Describe, in terms of valence electrons, how the chemical bonds form in the substance represented in diagram 1.

Answer 2

one valence electron is transferred from potassium to bromine

Question 3

Determine the total number of electrons in the bonds between the nitrogen atom and the three hydrogen atoms represented in diagram 2.

Answer 3

6 electrons

Question 4

Explain, in terms of distribution of charge, why a molecule of the substance represented in diagram 3 is nonpolar.

Answer 4

charge distribution is symmetrical in diagram 3 making it nonpolar

Question 5

Identify the noble gas that has atoms with the same electron configuration as the positive ion represented in diagram 1, when both the atoms and the ion are in the ground state.

Answer 5

Argon

Question 6

Compare the total mass of the reactants to the total mass of the product.

Answer 6

Mass of reactive is equal to the mass of the product

Question 7

State the type of intermolecular force responsible for the unusual boiling point of H2O( ) at standard pressure.

Answer 7

Hydrogen bonding

Question 8

Identify the compound that has the strongest intermolecular forces.

Answer 8

water

Question 9

Explain, in terms of molecular polarity, why the solubility of methanol in water is greater than the solubility of methane in water.

Answer 9

Methanol is more polar than methane. Methane is non-polar while water is polar.