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 one atom to another, while covalent bonds involve the sharing of electron pairs.

Question 2

A student is given a sample with a pH of 2. Which of the following statements is correct about this sample?

Accepted Answer

The sample is a strong acid.

Question 3

What is the atomic number and mass number of an atom with 11 protons and 12 neutrons?

Accepted Answer

Atomic number: 11, Mass number: 23

Question 4

Why are noble gases generally unreactive?

Accepted Answer

They have a full valence shell, making them energetically stable.

Question 5

Which of the following chemical equations is balanced according to the Law of Conservation of Mass?

Accepted Answer

$$2H_2 + O_2$ \rightarrow 2H_2O$$

Question 6

Which of the following substances is most likely to form an ionic bond?

Accepted Answer

Sodium ($$Na) $$and Chlorine ($$Cl)$$

Question 7

A solution turns blue on a pH indicator strip. Which pH value is most likely for this solution?

Accepted Answer

pH = 10

Question 8

Which of the following best explains why water ($$H_2O) is $$formed by covalent bonding?

Accepted Answer

Water is formed by the sharing of electron pairs between hydrogen and oxygen atoms.

Question 9

If a chemical reaction produces more atoms on the product side than the reactant side, which law is being violated?

Accepted Answer

Law of Conservation of Mass

Question 10

Which of the following is a correct statement about the pH scale?

Accepted Answer

A pH of 0 is strongly acidic.

Question 11

A chemist mixes sodium metal with chlorine gas to form table salt. What type of bond is formed in this reaction?

Accepted Answer

Ionic bond

Question 12

Which of the following best describes the electron arrangement in a covalent bond?

Accepted Answer

Electrons are shared between two atoms.

Question 13

A solution has a pH of 12. Which of the following best describes this solution?

Accepted Answer

It is a strong base.

Question 14

Which of the following is true about the mass number of an atom?

Accepted Answer

It is the sum of protons and neutrons.

Question 15

Which of the following best explains why sodium ($$Na) is $$likely to form an ionic bond with chlorine ($$Cl$$)?

Accepted Answer

Sodium easily loses an electron and chlorine easily gains an electron.

Question 16

Which of the following is NOT a property of noble gases?

Accepted Answer

They are highly reactive.

Question 17

Which of the following best describes the process of balancing a chemical equation?

Accepted Answer

Adding coefficients to ensure the same number of each atom on both sides.

Question 18

Which of the following pairs of elements is most likely to form a covalent bond?

Accepted Answer

Hydrogen and Oxygen

Question 19

A student claims that $$H_2$$ + $$O_2$$ \rightarrow 2H_2O$$ is a balanced equation. Is this correct?

Accepted Answer

No, because there are more oxygen atoms on the reactant side.

Question 20

Which of the following best describes a substance with a pH of 7?

Accepted Answer

Neutral

Atomic Structure, Chemical Bonding, and Acids/Bases: Study Notes

Study Guide - Practice Questions