Take The Covalent Bond Review Practice Test!

1. A _____ bond is a _____ bond that results from the sharing of valence electrons.

Covalent; chemical

Covalent; ionic

Covalent; covalent

None of the above

A covalent bond is a type of chemical bond that occurs when two atoms share valence electrons. This type of bond is formed between nonmetal atoms and is characterized by the sharing of electrons rather than the transfer of electrons, which is characteristic of ionic bonds. Therefore, the correct answer is "covalent; chemical."

Explanation

A covalent bond is a type of chemical bond that occurs when two atoms share valence electrons. This type of bond is formed between nonmetal atoms and is characterized by the sharing of electrons rather than the transfer of electrons, which is characteristic of ionic bonds. Therefore, the correct answer is "covalent; chemical."

2. A electron tries to achieve a count of eight valence electrons to become stable, this is known as the _______.

Covalent bonding

Exothermic reaction

Octet rule

All of the above

The octet rule states that atoms tend to gain, lose, or share electrons in order to achieve a stable configuration of eight valence electrons. This allows them to have a full outer electron shell, which is more energetically stable. Covalent bonding and exothermic reactions are both related to the octet rule, as covalent bonds involve the sharing of electrons to achieve stability, and exothermic reactions often occur when atoms gain or lose electrons to achieve a full outer shell. Therefore, the correct answer is the octet rule.

Explanation

The octet rule states that atoms tend to gain, lose, or share electrons in order to achieve a stable configuration of eight valence electrons. This allows them to have a full outer electron shell, which is more energetically stable. Covalent bonding and exothermic reactions are both related to the octet rule, as covalent bonds involve the sharing of electrons to achieve stability, and exothermic reactions often occur when atoms gain or lose electrons to achieve a full outer shell. Therefore, the correct answer is the octet rule.

3. Which of the following is NOT a factor of strength for a covalent bond?

Distance

Potential energy

Energy

Bond dissocaiton energy

Potential energy is not a factor of strength for a covalent bond. The strength of a covalent bond is determined by factors such as the distance between the bonded atoms, the amount of energy required to break the bond (bond dissociation energy), and the overall energy of the bond. Potential energy, on the other hand, refers to the stored energy an object possesses based on its position or state. While potential energy can influence the stability of a bond, it is not directly related to the strength of a covalent bond.

Explanation

Potential energy is not a factor of strength for a covalent bond. The strength of a covalent bond is determined by factors such as the distance between the bonded atoms, the amount of energy required to break the bond (bond dissociation energy), and the overall energy of the bond. Potential energy, on the other hand, refers to the stored energy an object possesses based on its position or state. While potential energy can influence the stability of a bond, it is not directly related to the strength of a covalent bond.

4. A triple bond is created when three electrons are shared with ______ atoms.

One

Two

Three

Four

A triple bond is created when three electrons are shared with two atoms. This is because a triple bond consists of one sigma bond and two pi bonds, and each bond involves the sharing of two electrons. Therefore, two atoms are required to form a triple bond.

Explanation

A triple bond is created when three electrons are shared with two atoms. This is because a triple bond consists of one sigma bond and two pi bonds, and each bond involves the sharing of two electrons. Therefore, two atoms are required to form a triple bond.

5. A ____ bond is formed when paralle orbitals overlap to share electrons.

Sigma

Covalent

Double

Pi

A pi bond is formed when parallel orbitals overlap to share electrons.

Explanation

A pi bond is formed when parallel orbitals overlap to share electrons.

6. Bonus: What the difference between an exothermic reaction and a endothermic reaction?

An exothermic reaction releases energy in the form of heat or light, while an endothermic reaction absorbs energy from its surroundings. In an exothermic reaction, the products have less energy than the reactants, resulting in a release of energy. In contrast, an endothermic reaction requires an input of energy to proceed, causing the products to have more energy than the reactants.

Explanation

An exothermic reaction releases energy in the form of heat or light, while an endothermic reaction absorbs energy from its surroundings. In an exothermic reaction, the products have less energy than the reactants, resulting in a release of energy. In contrast, an endothermic reaction requires an input of energy to proceed, causing the products to have more energy than the reactants.

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