Chemical Bonds
Do you know your bonds?
- 1.
Why do atoms bond?
- A.
To empty their valence shell
- B.
To become stable
- C.
To gain one more elctron
- D.
To create a new element
Correct Answer
B. To become stableExplanation
Atoms bond to become stable. When atoms bond, they share, gain, or lose electrons in order to achieve a full outermost energy level, also known as a valence shell. This allows the atom to have a more stable electron configuration, similar to that of a noble gas. By achieving stability, atoms minimize their energy and increase their overall stability, which is why they bond with other atoms.Rate this question:
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- 2.
What does the Octet Rule state?
- A.
Atoms lose, gain, or share electrons to obtain 9 valence electrons
- B.
Atoms always gain electrons to obtain 8 valence electrons
- C.
Atoms never change
- D.
Atoms lose, gain, or share electrons to obtain 8 valence electrons
Correct Answer
D. Atoms lose, gain, or share electrons to obtain 8 valence electronsExplanation
The Octet Rule states that atoms lose, gain, or share electrons in order to obtain 8 valence electrons. This is because having a full outer electron shell, which consists of 8 electrons, makes an atom more stable. By gaining, losing, or sharing electrons, atoms can achieve this stable electron configuration and become more chemically stable.Rate this question:
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- 3.
What do the dots on the Lewis Dot Structure represent?
- A.
The element
- B.
The type of bond
- C.
All the electrons
- D.
The valence electrons
Correct Answer
D. The valence electronsExplanation
The dots on the Lewis Dot Structure represent the valence electrons. Valence electrons are the outermost electrons in an atom and they are involved in chemical bonding. The Lewis Dot Structure is a way to represent the valence electrons of an atom using dots around the symbol. Each dot represents one valence electron, and this structure helps to determine the type of bond and the overall structure of a molecule.Rate this question:
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- 4.
Which kind of bond is formed when one or more electron is shared between atoms?
- A.
Ionic bond
- B.
Covalent bond
- C.
Pi bond
- D.
Sigma bond
Correct Answer
B. Covalent bondExplanation
A covalent bond is formed when one or more electrons are shared between atoms. In this type of bond, the atoms involved share their outer electrons to achieve a more stable electron configuration. This sharing of electrons allows both atoms to fill their outermost energy levels and form a strong bond. Covalent bonds are typically formed between nonmetal atoms and can be either single, double, or triple bonds depending on the number of shared electrons.Rate this question:
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- 5.
What kind of bond transfers electrons?
- A.
Ionic bond
- B.
Metallic bond
- C.
Covalent bond
- D.
Polar covalent bond
Correct Answer
A. Ionic bondExplanation
Ionic bonds transfer electrons between atoms. In an ionic bond, one atom donates electrons to another atom, resulting in the formation of positively and negatively charged ions. This transfer occurs between a metal and a non-metal, where the metal atom loses electrons to become a positively charged ion, and the non-metal atom gains those electrons to become a negatively charged ion. The attraction between these opposite charges holds the ions together, forming an ionic bond.Rate this question:
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- 6.
How many electrons are involved in a single covalent bond?
- A.
3
- B.
1
- C.
2
- D.
4
Correct Answer
C. 2Explanation
A single covalent bond involves the sharing of two electrons between two atoms. This bond is formed when two atoms come together and each contributes one electron to the shared pair. Therefore, the correct answer is 2.Rate this question:
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- 7.
What kind of bond do two hydrogen atoms form?
- A.
Covalent
- B.
Ionic
- C.
Pi
- D.
Sigma
Correct Answer
A. CovalentExplanation
Two hydrogen atoms form a covalent bond. In a covalent bond, the atoms share electrons to achieve a stable electron configuration. In the case of hydrogen, each atom has one electron, and they share these electrons to fill their outermost energy level. This sharing of electrons creates a strong bond between the two hydrogen atoms, resulting in the formation of a stable molecule of hydrogen gas. Therefore, the correct answer is covalent.Rate this question:
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- 8.
Find the compound that is held together by an ionic bond?
- A.
H2O
- B.
CO2
- C.
KCl
- D.
H2
Correct Answer
C. KClExplanation
Ionic bonds hold cation and anions. KCl is the only compound with a cation and anionRate this question:
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- 9.
NaCl is considered a molecule
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
only nonmetals are considered molecules. Na is a metalRate this question:
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- 10.
How many formula units are in 13 NaCl?
Correct Answer
13Explanation
NaCl is a formula unit, so 13 NaCl would mean you have 13 formula unitsRate this question:
- 11.
How many hydrogen atoms are in 12 H2O molecules?
Correct Answer
24Explanation
There are 2 hydrogen atoms in 1 molecule of H2O. You have 12 of them, so multiply 2 x 12 = 24Rate this question:
- 12.
Find the compound that is held together by a covalent bond?
- A.
NaCl
- B.
NO2
- C.
MgCl2
- D.
BaO
Correct Answer
B. NO2Explanation
Covalent bonds hold nonmetals together. NO2 is the only compound that have all nonmetals.Rate this question:
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- 13.
The metallic bond is weaker than the covalent and ionic bond.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Metallic bonds are formed between metal atoms, where the valence electrons are delocalized and free to move throughout the metal lattice. This sharing of electrons creates a strong bond, but it is weaker than covalent and ionic bonds. In covalent bonds, atoms share electrons, forming a strong bond, while in ionic bonds, atoms transfer electrons, creating a strong electrostatic attraction between oppositely charged ions. Therefore, the statement that metallic bonds are weaker than covalent and ionic bonds is true.Rate this question:
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- 14.
Metallic bonds get a lot of their physical properties from the _______ ___ _________.
Correct Answer
sea of electronsExplanation
From the Homework videoRate this question:
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Mar 14, 2023Quiz Edited by
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Oct 30, 2015Quiz Created by
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