Question 1

According to the octet rule, why do atoms tend to form bonds with other atoms?

Accepted Answer

To achieve a full outer electron shell, usually with 8 electrons

Question 2

Which of the following best describes a covalent bond?

Accepted Answer

A bond where electrons are shared equally or unequally between atoms

Question 3

What type of bond is formed when one atom steals electrons from another atom?

Accepted Answer

Ionic bond

Question 4

Which of the following is NOT a macromolecule?

Accepted Answer

Water

Question 5

A molecule is defined as:

Accepted Answer

Two or more atoms held together by a covalent bond

Question 6

Which of the following is an example of a macromolecule found in living organisms?

Accepted Answer

Protein

Question 7

Which statement about hydrogen bonds is correct?

Accepted Answer

They are weaker than covalent and ionic bonds

Question 8

If an atom has 7 electrons in its outer shell, what is it most likely to do?

Accepted Answer

Gain 1 electron to achieve a full outer shell

Question 9

Which of the following best explains why sodium (Na) and chlorine (Cl) form an ionic bond in table salt (NaCl)?

Accepted Answer

Sodium donates an electron to chlorine, resulting in oppositely charged ions that attract each other

Question 10

Which of the following is a correct example of a molecule?

Accepted Answer

$$\mathrm{H_2O}$$

Question 11

Which of the following statements about macromolecules is true?

Accepted Answer

They are large molecules made up of smaller subunits

Question 12

Which type of bond is primarily responsible for holding the two strands of DNA together?

Accepted Answer

Hydrogen bonds

Question 13

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

Accepted Answer

Covalent bonds involve sharing electrons, while ionic bonds involve transferring electrons

Question 14

Which of the following is NOT a reason why atoms form bonds?

Accepted Answer

To increase their atomic number

Question 15

Which of the following is a property of molecules formed by covalent bonds?

Accepted Answer

They can be gases, liquids, or solids at room temperature

Chemical Bonds and Biological Macromolecules

Study Guide - Practice Questions