Covalent Bonding
Chemistry ⇒ Chemical Bonding and Structure
Covalent Bonding starts at 8 and continues till grade 12.
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Context: The Lewis structure of methane (CH4) shows four single bonds between carbon and hydrogen atoms.
How many electrons are shared in total in a methane molecule?
Context: The Lewis structure of water (H2O) shows two single bonds and two lone pairs on the oxygen atom.
How many total valence electrons are present in a water molecule?
Describe the difference between a single, double, and triple covalent bond.
Describe what is meant by the term 'electronegativity' in the context of covalent bonding.
Explain why covalent compounds generally do not conduct electricity.
Explain why diamond has a very high melting point.
Context: The Lewis structure of methane (CH4) shows four single bonds between carbon and hydrogen atoms.
How many electrons are shared in total in a methane molecule?
Context: The Lewis structure of water (H2O) shows two single bonds and two lone pairs on the oxygen atom.
How many total valence electrons are present in a water molecule?
Which of the following best describes a covalent bond?
(1) A bond formed by the transfer of electrons
(2) A bond formed by the sharing of electron pairs
(3) A bond formed by the attraction between ions
(4) A bond formed by the sharing of protons
Which of the following best describes a polar covalent bond?
(1) Electrons are shared equally
(2) Electrons are shared unequally
(3) Electrons are transferred
(4) Protons are shared
Which of the following best explains why covalent bonds are strong?
(1) The attraction between positive and negative ions
(2) The sharing of electrons creates a stable electron configuration
(3) The presence of free electrons
(4) The transfer of electrons between atoms
Which of the following elements is most likely to form covalent bonds?
(1) Sodium
(2) Chlorine
(3) Magnesium
(4) Potassium
Fill in the blank: In a molecule of oxygen (O2), the two oxygen atoms are joined by a ______ covalent bond.
Fill in the blank: In a single covalent bond, two atoms share ______ pair(s) of electrons.
Fill in the blank: The bond between two hydrogen atoms in H2 is a ______ covalent bond.
Fill in the blank: The chemical formula for ammonia is ______.
True or False: A molecule of methane (CH4) contains four single covalent bonds.
True or False: Covalent bonds can be found in both molecules and giant covalent structures like diamond.
True or False: Covalent bonds can only form between identical atoms.
True or False: Covalent bonds usually form between two nonmetal atoms.
