Question 1

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

Accepted Answer

Ionic bonds involve the transfer of electrons from a metal to a nonmetal, while covalent bonds involve the sharing of electrons between two nonmetals.

Question 2

A magnesium atom (Mg) has 12 protons and 12 electrons. When it forms an ion, what is its charge and electron configuration?

Accepted Answer

It loses two electrons to form Mg$$^{2+}$$ with 10 electrons.

Question 3

Which of the following compounds is molecular?

Accepted Answer

H$$_2O$$

Question 4

What is the correct formula for the ionic compound formed between barium (Ba$$^{2+}) $$and chloride (Cl$$^-$$)?

Accepted Answer

BaCl$$_2$$

Question 5

Which of the following ions is isoelectronic with neon (Ne)?

Accepted Answer

Na$$^+$$

Question 6

What is the name of the compound FeCl$$_3$$?

Accepted Answer

Iron(III) chloride

Question 7

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

Accepted Answer

Al$$_2(SO$_4$$)$$_3$$

Question 8

A patient is prescribed potassium iodide to prevent iodine deficiency. What is the formula for potassium iodide?

Accepted Answer

KI

Question 9

Which of the following is a polyatomic ion with a positive charge?

Accepted Answer

NH$$_4^+$$

Question 10

What is the correct name for the molecular compound P$$_2O$_5$$?

Accepted Answer

Diphosphorus pentoxide

Question 11

Which of the following best describes the shape of a methane (CH$$_4) $$molecule according to VSEPR theory?

Accepted Answer

Tetrahedral with bond angles of 109°

Question 12

Which molecule is nonpolar despite having polar bonds?

Accepted Answer

CO$$_2$$

Question 13

What is the strongest type of intermolecular force present in water (H$$_2O$$)?

Accepted Answer

Hydrogen bonding

Question 14

Which of the following compounds has the highest melting point?

Accepted Answer

NaCl

Question 15

What is the correct formula for dinitrogen trioxide?

Accepted Answer

N$$_2O$_3$$

Question 16

Which of the following is the correct Lewis structure for a fluorine molecule (F$$_2$$)?

Accepted Answer

Each F atom shares one electron, forming a single bond, with three lone pairs on each F.

Question 17

Which of the following best describes the shape of ammonia (NH$$_3) $$according to VSEPR theory?

Accepted Answer

Trigonal pyramidal

Question 18

A compound contains the polyatomic ion SO$$_3$$^{2-}$$. What is the name of this ion?

Accepted Answer

Sulfite

Question 19

Which of the following is a real-world example of a compound containing a polyatomic ion used in medicine?

Accepted Answer

Al(OH)$$_3 as an $$antacid

Question 20

Which of the following statements about dispersion forces is correct?

Accepted Answer

Dispersion forces are weak attractions that occur between nonpolar molecules due to temporary dipoles.

Chapter 6: Ionic and Molecular Compounds – Study Notes for GOB Chemistry

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