Multiple Choice
Which of the following diatomic molecules is joined by a double covalent bond?
11. Bonding & Molecular Structure
Chemical Bonds
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Why do atoms share electrons in a covalent bond?
A
To increase their atomic mass
B
To achieve a full outer electron shell and increase stability
C
To decrease their atomic number
D
To become positively charged ions
Verified step by step guidance1
Understand that atoms form bonds to achieve greater stability, often by filling their outer electron shells.
Recognize that a covalent bond involves the sharing of electrons between atoms.
Recall that atoms aim to achieve a full outer electron shell, similar to the electron configuration of noble gases, which are stable.
Note that sharing electrons in a covalent bond allows each atom to count the shared electrons towards its own outer shell, helping achieve a full shell.
Conclude that the primary reason atoms share electrons in a covalent bond is to achieve a full outer electron shell, thereby increasing their stability.
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