1.
What is the definition of a covalent bond?
Correct Answer
D. A chemical bond that involves sharing a pair of electrons between atoms in a molecule.
Explanation
The correct answer is a chemical bond that involves sharing a pair of electrons between atoms in a molecule. This is the definition of a covalent bond, where two atoms share electrons in order to achieve a stable electron configuration. Covalent bonds are typically formed between nonmetal atoms and are responsible for the formation of molecules.
2.
Three lines connected atoms to one another represent a _______.
Correct Answer
triple bond
Explanation
Three lines connected atoms to one another represent a triple bond. A triple bond is a type of chemical bond formed when three pairs of electrons are shared between two atoms. This bond is represented by three lines in a molecular structure diagram, indicating the strength and stability of the bond.
3.
What is a sigma bond?
Correct Answer
B. The chemical bond resulting from the formation of a molecular orbital by the end-on overlap of atomic orbitals.
Explanation
A sigma bond is a type of covalent bond formed by the end-on overlap of atomic orbitals, resulting in the formation of a molecular orbital. In a sigma bond, the electron density is concentrated along the line bonding the atoms. This type of bond allows for the sharing of electrons between atoms, leading to the formation of polyatomic chemical compounds.
4.
What is the octect rule?
Correct Answer
A. Electrons try to obtain a full outer orbital to become stable.
Explanation
The octet rule states that atoms tend to gain, lose, or share electrons in order to achieve a full outer orbital, which typically consists of eight electrons. This is because having a full outer orbital makes an atom more stable. Therefore, the correct answer is "electrons try to obtain a full outer orbital to become stable."
5.
a _______ __________ ________ consists of one pair of shared electrons in two atoms.
Correct Answer
single covalent bond
Explanation
A single covalent bond consists of one pair of shared electrons in two atoms. In a covalent bond, atoms share electrons to achieve a stable electron configuration. In a single covalent bond, only one pair of electrons is shared between the two atoms. This sharing of electrons allows both atoms to fill their outermost energy levels and become more stable.
6.
Covalent bonds _____ electrons between atoms.
Correct Answer
share
Explanation
Covalent bonds involve the sharing of electrons between atoms. In this type of bond, two atoms share one or more pairs of electrons in order to achieve a stable electron configuration. This sharing of electrons allows both atoms to fill their outermost energy levels and attain a more stable state. Therefore, the correct answer is "share".
7.
Ionic bonds ________ electrons or ______ electrons between two atoms.
Correct Answer
gain lose
Explanation
Ionic bonds involve the transfer of electrons between two atoms. In this process, one atom gains electrons to achieve a stable electron configuration, while the other atom loses electrons. This exchange of electrons results in the formation of positively charged ions (cations) and negatively charged ions (anions), which are then attracted to each other due to their opposite charges, forming an ionic bond.
8.
What is this an example of?
Correct Answer
C. Double covalent bond
Explanation
This is an example of a double covalent bond. In a double covalent bond, two pairs of electrons are shared between two atoms. This type of bond is stronger and shorter than a single covalent bond, but weaker and longer than a triple covalent bond. It is formed when two atoms share four electrons, resulting in a stable molecular structure.
9.
a _____ _____ is a type of covalent bond in which the electron density is concentrated around the line bonding the atoms.
Correct Answer
pi bond.
Explanation
A pi bond is a type of covalent bond in which the electron density is concentrated above and below the bonding axis, forming a cloud of electron density that is shaped like the Greek letter pi (π). This type of bond occurs when two atomic orbitals overlap side by side, allowing the electrons to be shared. The pi bond is weaker than a sigma bond, but it is important in the formation of double and triple bonds between atoms.
10.
This is an example of the ______________________.
Correct Answer
lewis dot structure.
Explanation
This question is asking for the term that describes the given example, which is "lewis dot structure." A Lewis dot structure is a diagram that represents the bonding between atoms in a molecule and the lone pairs of electrons that may exist in the molecule. It uses dots to represent the valence electrons of an atom and lines to represent covalent bonds.