24.1.1 General Properties of Nonmetals

Question 1

In which of the following compounds would you expect to find only polar covalent bonds?

Answer 1

PBr3

Question 2

Complete the following analogy:

Ammonia : phosphine :: methane : _________________

Answer 2

Silane

Question 3

When the elements C, N, and O are compared with those directly below them on the periodic table (Si, P, and S), the following is observed:
CO2 is a trinuclear molecular species that is a gas at room temperature, while SiO2 is an extended network solid.
N2 exists as a gas, but the elemental form of phosphorus, P4, is a tetrahedral solid.
Oxygen gas is a diatomic molecule, but sulfur exists as solid S8.
What phenomenon do these observations demonstrate?

Answer 3

Overlap in the 2p orbitals tends to increase π-bonding.

Question 4

Which of the following elements is not a liquid at 29.5 ° C?

Answer 4

Ga

Question 5

Which of the following has the ability to possess either positive or negative oxidation states or charge?

Answer 5

Nonmetals

Question 6

Which of these compounds contains only sigma (σ) bonds?

Answer 6

S8

Question 7

Which of these compounds contains only sigma (σ) bonds?

Answer 7

Alkali metals: H, Li, Na, K, Rb, Cs, Fr

Question 8

For the following nonmetal compounds or ions, oxidation states (or oxidation numbers) have been assigned to all atoms. Which has the oxidation states INCORRECTLY assigned?

Answer 8

NO3− N is +6 O is −2

Question 9

Which of the following elements shows the least propensity for π-bonding in compounds?

Answer 9

Boron

Question 10

Which of the following homonuclear molecular species contains π bonds?

Answer 10

N2