Question 1

Which of the following best explains why fluorine has a higher electronegativity than lithium?

Accepted Answer

Fluorine has more protons, increasing the effective nuclear charge and attracting electrons more strongly.

Question 2

Which of the following compounds contains both ionic and covalent bonds?

Accepted Answer

NaNO_3

Question 3

What is the correct formula for ammonium sulfate?

Accepted Answer

$(NH_4)_2SO_4$

Question 4

Which of the following best describes the trend in atomic radius across a period from left to right?

Accepted Answer

Atomic radius decreases due to increasing effective nuclear charge.

Question 5

Which of the following is the correct name for $P_2O_5$?

Accepted Answer

Diphosphorus pentoxide

Question 6

A sample of magnesium reacts with oxygen to form magnesium oxide. Which type of bond is present in the product?

Accepted Answer

Ionic

Question 7

Which of the following best explains why metals are good conductors of electricity?

Accepted Answer

Metals have delocalized electrons that can move freely throughout the structure.

Question 8

Which of the following is the correct Lewis structure for carbon dioxide ($CO_2$)?

Accepted Answer

O=C=O, with each O atom having two lone pairs

Question 9

Which of the following best describes the bonding in sodium chloride ($NaCl$)?

Accepted Answer

Electrostatic attraction between oppositely charged ions

Question 10

Which of the following acids is correctly paired with its formula?

Accepted Answer

Sulfuric acid: $H_2SO_4$

Question 11

Which of the following best explains why chlorine has a higher ionization energy than sodium?

Accepted Answer

Chlorine has a greater effective nuclear charge, holding its electrons more tightly.

Question 12

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

Accepted Answer

$Ca_3(PO_4)_2$

Question 13

Which of the following molecules is nonpolar?

Accepted Answer

$CO_2$

Question 14

Which of the following best describes the trend in ionization energy down a group in the periodic table?

Accepted Answer

Ionization energy decreases due to increased atomic radius and electron shielding.

Question 15

Which of the following is the correct name for $Fe_2O_3$?

Accepted Answer

Iron (III) oxide

Question 16

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

Accepted Answer

Strong electrostatic forces hold the ions together in a lattice structure.

Question 17

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

Accepted Answer

$Al(OH)_3$

Question 18

Which of the following best describes a polar covalent bond?

Accepted Answer

A bond in which electrons are shared unequally between two atoms.

Question 19

Which of the following is the correct name for $N_2O_4$?

Accepted Answer

Dinitrogen tetroxide

Question 20

Which of the following best explains why water ($H_2O$) has a bent molecular shape?

Accepted Answer

The two lone pairs on oxygen repel the hydrogen atoms, creating a bent shape.

Element and Compound Properties: Bonding, Nomenclature, and Periodic Trends

Study Guide - Practice Questions