Question 1

Which type of elements typically form covalent bonds by sharing valence electrons?

Accepted Answer

Nonmetals

Question 2

According to the octet rule, how many valence electrons do most atoms seek to achieve in their outer shell when forming covalent bonds?

Accepted Answer

$$8$$

Question 3

Which of the following elements is most likely to form covalent bonds?

Accepted Answer

Cl

Question 4

Which rule states that hydrogen atoms achieve stability by having two valence electrons when forming covalent bonds?

Accepted Answer

Duet Rule

Question 5

Which of the following is a property of covalent compounds compared to ionic compounds?

Accepted Answer

Poor electrical conductivity

Question 6

A student observes that a compound is a liquid at room temperature and does not conduct electricity. What type of bonding is most likely present in this compound?

Accepted Answer

Covalent bonding

Question 7

Which of the following best explains why covalent compounds generally have low melting and boiling points?

Accepted Answer

They have weak intermolecular forces between molecules.

Question 8

Which of the following diagrams best represents the sharing of electrons in a single covalent bond between two hydrogen atoms?

Accepted Answer

$$\mathrm{H} - \mathrm{H}$$

Question 9

Which of the following statements about covalent compounds is FALSE?

Accepted Answer

They conduct electricity well in aqueous solution.

Question 10

A molecule of $$\mathrm{O}_2$$ forms when two oxygen atoms share electrons. How many electrons are shared between the two atoms in this molecule?

Accepted Answer

$$4$$

Question 11

Which of the following best describes the difference between the duet rule and the octet rule?

Accepted Answer

The duet rule applies to hydrogen and helium, while the octet rule applies to most other elements.

Question 12

Which of the following best explains why covalent compounds do not conduct electricity in the solid or liquid state?

Accepted Answer

They have no charged particles that are free to move.

Question 13

Which of the following is a real-world example of a covalent compound?

Accepted Answer

Water ($$\mathrm{H}_2\mathrm{O})$$

Question 14

Which of the following best describes the electron configuration of a chlorine atom after it forms a single covalent bond?

Accepted Answer

It has a full octet in its outer shell.

Question 15

Which of the following statements about the physical state of covalent compounds at room temperature is generally true?

Accepted Answer

They can be solids, liquids, or gases.

Question 16

A chemist is comparing the melting points of sodium chloride and carbon dioxide. Which statement is correct?

Accepted Answer

Sodium chloride has a higher melting point because it is ionic.

Question 17

Which of the following best explains why noble gases do not typically form covalent bonds?

Accepted Answer

They already have a full octet of electrons.

Question 18

Which of the following best describes the type of bond formed in a molecule of $$\mathrm{H}_2$$?

Accepted Answer

Covalent bond

Question 19

Which of the following is NOT a typical property of covalent compounds?

Accepted Answer

High solubility in water due to ionic character

Question 20

A patient is given a medication that is a covalent compound. Which of the following is most likely true about this medication?

Accepted Answer

It will have a low melting point.

Covalent Bonding and Covalent Compound Properties

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