Covalent Bonding

According to the octet rule most elements need _______ valence electrons.
2
4
8
18
What is a covalent bond?
A chemical bond formed by the sharing of electrons between atoms
A chemical bond formed by the transfer of electrons between atoms
A chemical bond formed by the attraction of opposite charges
A chemical bond formed by the repulsion of like charges
Which of the following elements commonly form covalent bonds?
Carbon
Oxygen
Sodium
Fluorine
Potassium
What is the octet rule in covalent bonding?
Atoms tend to gain, lose, or share electrons to achieve a full outer shell of eight electrons
Atoms tend to gain, lose, or share electrons to achieve a full inner shell of eight electrons
Atoms tend to gain, lose, or share electrons to achieve a full outer shell of six electrons
Atoms tend to gain, lose, or share electrons to achieve a full inner shell of six electrons
Which of the following molecules has a double covalent bond?
Oxygen (O2)
Carbon Dioxide (CO2)
Methane (CH4)
Ammonia (NH3)
Water (H2O)
Which of the following molecules has a triple covalent bond?
Nitrogen (N2)
Carbon Dioxide (CO2)
Methane (CH4)
Ammonia (NH3)
Water (H2O)
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