Question 1

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

Accepted Answer

Sodium loses one electron to form Na+.

Question 2

A pharmacy technician is preparing a medication that contains magnesium chloride. Which of the following is the correct formula for magnesium chloride?

Accepted Answer

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

Question 3

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

Accepted Answer

Ionic bonds involve the transfer of electrons from a metal to a nonmetal.

Question 4

What is the name of the compound with the formula $$\mathrm{Al_2O_3}$$?

Accepted Answer

Aluminum oxide

Question 5

A patient is prescribed potassium iodide to prevent iodine deficiency. What are the ions present in potassium iodide?

Accepted Answer

$$\mathrm{K^+}$$ and $$\mathrm{I^-}$$

Question 6

Which of the following compounds contains a polyatomic ion?

Accepted Answer

$$\mathrm{Ca(NO_3$)_2}$$

Question 7

What is the correct name for the compound $$\mathrm{$$FeCl_2$$}$$?

Accepted Answer

Iron(II) chloride

Question 8

Which of the following best describes the bond in a molecule of $$\mathrm{HCl}$$?

Accepted Answer

Polar covalent bond

Question 9

A compound is found to have the formula $$\mathrm{Na_2S}. $$What is the name of this compound?

Accepted Answer

Sodium sulfide

Question 10

Which of the following molecules is nonpolar?

Accepted Answer

$$\mathrm{CO_2$}$$

Question 11

What is the main attractive force present in liquid ammonia ($$\mathrm{NH_3$}$$)?

Accepted Answer

Hydrogen bonds

Question 12

Which of the following formulas represents a compound with a trigonal pyramidal molecular shape?

Accepted Answer

$$\mathrm{NH_3$}$$

Question 13

Which of the following is the correct formula for iron(III) oxide?

Accepted Answer

$$\mathrm{Fe_2O_3}$$

Question 14

Which of the following best explains why ionic compounds have high melting points?

Accepted Answer

They have strong attractive forces between ions.

Question 15

What is the correct name for the compound $$\mathrm{P_2O_5}$$?

Accepted Answer

Diphosphorus pentoxide

Question 16

Which of the following is a property of molecular (covalent) compounds?

Accepted Answer

They have low melting points compared to ionic compounds.

Question 17

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

Accepted Answer

$$\mathrm{Al_2$(SO_4$)_3}$$

Question 18

Which of the following best describes the electron arrangement in a molecule of methane ($$\mathrm{CH_4$}$$)?

Accepted Answer

Tetrahedral

Question 19

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

Accepted Answer

Dinitrogen tetroxide

Question 20

A molecule of $$\mathrm{SO_2$}$$ has three electron groups around the central atom. What is its molecular shape?

Accepted Answer

Bent

Ionic and Molecular Compounds: Structure, Naming, and Properties

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