Question 1

Which of the following best describes the process by which sodium (Na) forms an ion?

Accepted Answer

Sodium loses one electron to achieve a full octet, becoming a positively charged ion.

Question 2

What is the correct formula for a compound formed between aluminum ions ($$\mathrm{Al$$^{3+}$$}) $$and oxide ions ($$\mathrm{O$$^{2-}$$}$$)?

Accepted Answer

$$\mathrm{Al_2O_3}$$

Question 3

Which of the following compounds contains a polyatomic ion?

Accepted Answer

$$\mathrm{$$KNO_3$$}$$

Question 4

A molecule of water ($$\mathrm{H_2O}) $$has which molecular shape according to VSEPR theory?

Accepted Answer

Bent

Question 5

Which of the following statements about ionic and covalent bonds is correct?

Accepted Answer

Ionic bonds form between a metal and a nonmetal by transferring electrons.

Question 6

What is the main attractive force present in liquid $$\mathrm{H_2O}$$?

Accepted Answer

Hydrogen bonds

Question 7

Which of the following molecules is nonpolar?

Accepted Answer

$$\mathrm{CO_2$}$$

Question 8

What is the correct name for the compound $$\mathrm{$$FeCl_3$$}$$?

Accepted Answer

Iron(III) chloride

Question 9

Which of the following best explains why $$\mathrm{NaCl}$$ has a high melting point?

Accepted Answer

It contains strong ionic bonds between ions.

Question 10

What is the correct formula for a compound formed between potassium ions ($$\mathrm{K^+}) $$and nitride ions ($$\mathrm{N$$^{3-}$$}$$)?

Accepted Answer

$$\mathrm{K_3N}$$

Question 11

Which of the following molecules has a trigonal pyramidal shape?

Accepted Answer

$$\mathrm{NH_3$}$$

Question 12

Which of the following ions is polyatomic?

Accepted Answer

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

Question 13

What is the electronegativity difference that typically indicates a polar covalent bond?

Accepted Answer

$$0.5 to$$ $$1.8$$

Question 14

Which of the following compounds is named using prefixes?

Accepted Answer

$$\mathrm{CO_2$}$$

Question 15

Which of the following is the correct name for $$\mathrm{N_2O_5}$$?

Accepted Answer

Nitrogen pentoxide

Question 16

Which of the following best describes the bonding in $$\mathrm{CH_4$} ($$methane)?

Accepted Answer

Four single covalent bonds

Question 17

Which of the following molecules contains a triple bond?

Accepted Answer

$$\mathrm{HCN}$$

Question 18

Which of the following is the main attractive force present in liquid $$\mathrm{Br_2$}$$?

Accepted Answer

Dispersion forces

Question 19

A compound contains $$\mathrm{Cu^+}$$ and $$\mathrm{Cl^-}$$ ions. What is its correct name?

Accepted Answer

Copper(I) chloride

Question 20

Which of the following statements about the octet rule is correct?

Accepted Answer

Some elements, such as boron, can be stable with fewer than eight valence electrons.

Ionic and Molecular Compounds: Structure, Naming, and Properties

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