$$\frac{2}{5} \times 100\% = 40\%$$

Question 1

Which of the following best explains why chemical bonds form between atoms?

Accepted Answer

Atoms bond because they lower the potential energy of the charged particles that compose atoms.

Question 2

Which statement correctly describes the formation of an ionic bond between sodium (Na) and chlorine (Cl)?

Accepted Answer

Sodium loses an electron to chlorine, forming Na$$^+$$ and Cl$$^-.$$

Question 3

What is the lattice energy for CaO, and what does a higher lattice energy indicate about the compound?

Accepted Answer

CaO has a lattice energy of $$-3414 kJ/$$mol, indicating stronger ionic bonds and higher melting/boiling points.

Question 4

Which of the following is a correct empirical formula for hydrogen peroxide?

Accepted Answer

$$\mathrm{HO}$$

Question 5

Which of the following ions is a common polyatomic ion and has the formula $$\mathrm{NO}_3^-$$?

Accepted Answer

Nitrate

Question 6

What is the correct name for the ionic compound $$\mathrm{Na}_2\mathrm{SO}_4$$?

Accepted Answer

Sodium sulfate

Question 7

Which of the following best describes a dative covalent (coordinate) bond?

Accepted Answer

A bond where one atom provides both electrons for the shared pair.

Question 8

Which electron configuration represents a fluoride ion ($$\mathrm{F}^-$$)?

Accepted Answer

$$[\mathrm{Ne}]$$

Question 9

What is the mass percent of element X in a compound if the compound contains 2 mol of X in a total of 5 mol of the compound?

Accepted Answer

$$\frac{2}{5} 	imes 100\% = 40\%$$

Question 10

Which of the following is true about metallic bonding?

Accepted Answer

Metallic bonding results in metal cations held together by their attraction to a sea of surrounding electrons.

Question 11

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

Accepted Answer

$$\mathrm{Al}_2(\mathrm{SO}_4)_3$$

Question 12

Which statement best describes the difference between ionic and covalent bonding?

Accepted Answer

Ionic bonding involves the transfer of electrons from one atom to another, while covalent bonding involves the sharing of electrons between atoms.

Question 13

Which of the following is a correct Lewis electron-dot structure for methane ($$\mathrm{CH}_4$$)?

Accepted Answer

Central C atom with four single bonds to H atoms, each H with no lone pairs.

Question 14

Which of the following is the correct name for the compound $$\mathrm{NH}_4\mathrm{NO}_3$$?

Accepted Answer

Ammonium nitrate

Question 15

What is the formula unit for sodium chloride?

Accepted Answer

$$\mathrm{NaCl}$$

Question 16

Which of the following best describes a lone electron pair?

Accepted Answer

A pair of electrons not shared by atoms and belonging to a particular atom.

Question 17

Which of the following is the correct formula for calcium phosphate?

Accepted Answer

$$\mathrm{Ca}_3(\mathrm{PO}_4)_2$$

Question 18

Which of the following is a correct statement about the electron configuration of s-block metals after ionization?

Accepted Answer

The electron configuration matches that of the preceding noble gas.

Question 19

Which of the following is the correct name for $$\mathrm{KNO}_3$$?

Accepted Answer

Potassium nitrate

Question 20

Which of the following best describes the structure of network solids?

Accepted Answer

Network solids are formed from covalent bonds between atoms in a continuous network.

Chemical Bonding, Lattice Energy, and Chemical Formulas: A Study Guide

스터디 가이드 - 연습 문제