Question 1

Which of the following statements best explains why the ionic radius of a cation is smaller than its neutral atom?

Accepted Answer

Cations have more protons than electrons, increasing the effective nuclear charge and pulling electrons closer.

Question 2

Which of the following correctly names the compound $$\mathrm{$$FeCl_3$$}$$?

Accepted Answer

Iron(III) chloride

Question 3

A patient is given a medication containing $$\mathrm{Na_2SO_4}. $$What is the correct name for this compound?

Accepted Answer

Sodium sulfate

Question 4

Which of the following ions has the largest radius?

Accepted Answer

$$\mathrm{Cl^-}$$

Question 5

What is the correct formula for ammonium phosphate?

Accepted Answer

$$\mathrm{(NH_4$)_3PO_4}$$

Question 6

Which of the following best describes the bonding in $$\mathrm{CO_2$}$$?

Accepted Answer

Each oxygen atom forms a double covalent bond with the central carbon atom.

Question 7

A compound is named dinitrogen pentoxide. What is its chemical formula?

Accepted Answer

$$\mathrm{N_2O_5}$$

Question 8

Which of the following molecules is nonpolar, despite having polar bonds?

Accepted Answer

$$\mathrm{CO_2$}$$

Question 9

What is the correct Lewis structure for $$\mathrm{H_2O}$$?

Accepted Answer

Oxygen in the center with two single bonds to hydrogen and two lone pairs on oxygen.

Question 10

Which of the following best describes the electron geometry and molecular geometry of $$\mathrm{NH_3$}$$?

Accepted Answer

Electron geometry: tetrahedral; Molecular geometry: trigonal pyramidal

Question 11

A transition metal forms a compound with the formula $$\mathrm{CuO}. $$What is the correct name for this compound?

Accepted Answer

Copper(II) oxide

Question 12

Which of the following best explains why $$\mathrm{F} is $$more electronegative than $$\mathrm{O}$$?

Accepted Answer

Fluorine has a higher effective nuclear charge and a smaller atomic radius, increasing its ability to attract electrons.

Question 13

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

Accepted Answer

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

Question 14

A patient is diagnosed with hypochloremia (low chloride ion concentration). Which of the following ions is deficient?

Accepted Answer

$$\mathrm{Cl^-}$$

Question 15

Which of the following best describes the difference between ionic and covalent bonds?

Accepted Answer

Ionic bonds involve the transfer of electrons from one atom to another, while covalent bonds involve the sharing of electrons.

Question 16

What is the correct name for $$\mathrm{$$SnO_2$$}$$, given that tin can have multiple oxidation states?

Accepted Answer

Tin(IV) oxide

Question 17

Which of the following molecules has a bent molecular geometry due to lone pairs on the central atom?

Accepted Answer

$$\mathrm{H_2O}$$

Question 18

Which of the following best describes the effect of adding a hydrogen ion to carbonate ($$\mathrm{CO_3$^{2-}}$$)?

Accepted Answer

It forms bicarbonate ($$\mathrm{$$HCO_3$$^-}$$), decreasing the negative charge by one.

Question 19

Which of the following compounds is most likely to be soluble in water and conduct electricity?

Accepted Answer

$$\mathrm{NaCl}$$

Question 20

A molecule has a central atom with four electron groups: two bonding pairs and two lone pairs. What is its molecular geometry?

Accepted Answer

Bent

Ionic and Covalent Bonds: Ions, Naming, and Molecular Structure

Study Guide - Practice Questions