Question 1

Which type of chemical bond forms when electrons are shared equally among the atoms in the bond?

Accepted Answer

Nonpolar covalent bond

Question 2

A hydrogen bond is best described as:

Accepted Answer

A weak interaction between a hydrogen atom of one molecule and an electronegative atom of another molecule.

Question 3

When electrons are shared unequally between two atoms, what type of bond is formed?

Accepted Answer

Polar covalent bond

Question 4

Which of the following best describes the formation of an ionic bond?

Accepted Answer

A cation and an anion are formed due to the transfer of electrons.

Question 5

If an atom loses an electron, it becomes a(n) ________; if it gains an electron, it becomes a(n) ________.

Accepted Answer

cation; anion

Question 6

Which of the following bonds is responsible for the unique properties of water, such as its high boiling point and surface tension?

Accepted Answer

Hydrogen bond

Question 7

Which statement correctly matches the bond type to its description?

Accepted Answer

Polar covalent bond: electrons are shared unequally between atoms.

Question 8

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

Accepted Answer

The bond between hydrogen and oxygen in a water molecule ($$\mathrm{H}_2\mathrm{O}).$$

Question 9

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

Accepted Answer

They have strong electrostatic attractions between oppositely charged ions.

Question 10

Consider the molecule $$\mathrm{CH}_4 ($$methane). What type of bond exists between the carbon and hydrogen atoms?

Accepted Answer

Nonpolar covalent bond

Question 11

Which of the following scenarios would most likely result in the formation of a hydrogen bond?

Accepted Answer

A hydrogen atom in one water molecule interacts with an oxygen atom in another water molecule.

Question 12

Which equation represents the formation of a cation from a neutral atom?

Accepted Answer

$$\mathrm{A} \rightarrow \mathrm{A}^+ + e^-$$

Question 13

Which of the following best describes the difference between a polar covalent bond and a nonpolar covalent bond?

Accepted Answer

Polar covalent bonds involve unequal sharing of electrons, while nonpolar covalent bonds involve equal sharing.

Question 14

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

Accepted Answer

A metal and a nonmetal with a large difference in electronegativity.

Question 15

Which of the following best describes the role of valence electrons in chemical bonding?

Accepted Answer

Valence electrons determine how an atom interacts and bonds with other atoms.

Question 16

Which of the following is a multi-step process that leads to the formation of an ionic compound?

Accepted Answer

An atom loses an electron to become a cation, another atom gains an electron to become an anion, and the two ions attract each other.

Question 17

Which of the following equations represents the formation of an anion?

Accepted Answer

$$\mathrm{B} + e^- \rightarrow \mathrm{B}^-$$

Question 18

Which of the following best explains why water is a good solvent for ionic compounds?

Accepted Answer

Water molecules have polar covalent bonds, allowing them to surround and separate ions.

Question 19

Which of the following is NOT a property of hydrogen bonds?

Accepted Answer

They are stronger than ionic bonds.

Atomic Structure and Chemical Bonds in Anatomy & Physiology Ch. 2 1-3

Guida di studio - Domande di pratica