Question 1

Which of the following best explains why diamond and graphite, both made of carbon atoms, have such different physical properties?

Accepted Answer

Diamond and graphite have different types of chemical bonds between their carbon atoms.

Question 2

Which of the following compounds is an example of an ionic compound?

Accepted Answer

NaCl

Question 3

What is the correct formula for a compound formed between Al3+ and O2- ions?

Accepted Answer

$$\mathrm{Al_2O_3}$$

Question 4

Which of the following best describes the bonding in metallic solids such as sodium metal?

Accepted Answer

Cations surrounded by a sea of delocalized electrons

Question 5

Which of the following is the correct name for the compound $$\mathrm{Fe_2O_3}$$?

Accepted Answer

Iron(III) oxide

Question 6

Which of the following statements about ionic compounds is FALSE?

Accepted Answer

They have low melting points.

Question 7

What is the correct Lewis structure for the nitrate ion, $$\mathrm{NO_3$^-}$$, in terms of total valence electrons?

Accepted Answer

$$\mathrm{NO_3$^-}$$ has 24 valence electrons.

Question 8

Which of the following best describes why ionic compounds do not conduct electricity in the solid state but do when melted or dissolved?

Accepted Answer

Ions are fixed in place in the solid but free to move in the liquid or solution.

Question 9

Which of the following is the correct name for $$\mathrm{N_2O_4}$$?

Accepted Answer

Dinitrogen tetraoxide

Question 10

Which of the following best explains why metals are malleable and ductile, while ionic solids are brittle?

Accepted Answer

Metals have a sea of electrons that allows ions to slide past each other without breaking bonds.

Question 11

Which of the following is the correct formula for copper(II) sulfate?

Accepted Answer

$$\mathrm{$$CuSO_4$$}$$

Question 12

Which of the following bonds is the most polar?

Accepted Answer

$$\mathrm{Na-Cl}$$

Question 13

What is the formal charge on the central nitrogen atom in the best Lewis structure for the ammonium ion, $$\mathrm{NH_4$^+}$$?

Accepted Answer

$$0$$

Question 14

Which of the following is the correct name for $$\mathrm{P_2O_5}$$?

Accepted Answer

Diphosphorus pentoxide

Question 15

Which of the following is a polyatomic ion?

Accepted Answer

$$\mathrm{NO_3$^-}$$

Question 16

Which of the following is the correct formula for magnesium chloride?

Accepted Answer

$$\mathrm{$$MgCl_2$$}$$

Question 17

Which of the following is the correct name for $$\mathrm{Ca(NO_2$)_2}$$?

Accepted Answer

Calcium nitrite

Question 18

Which of the following is the correct formula for ammonium sulfate?

Accepted Answer

$$\mathrm{(NH_4$)_2SO_4}$$

Question 19

Which of the following is the correct name for $$\mathrm{H_2SO_3}$$?

Accepted Answer

Sulfurous acid

Question 20

Which of the following is the correct formula for dinitrogen pentoxide?

Accepted Answer

$$\mathrm{N_2O_5}$$

Chapter 4: Basic Chemical Bonding – Compounds, Bond Types, and Lewis Structures

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