Covalent Bonding
Chemistry ⇒ Chemical Bonding and Structure
Covalent Bonding starts at 8 and continues till grade 12.
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See sample questions for grade 8
Describe the difference between a polar and a nonpolar covalent bond.
Describe the electron sharing in a molecule of hydrogen (H2).
Explain why chlorine (Cl2) forms a nonpolar covalent bond.
Explain why covalent compounds do not conduct electricity.
Explain why water (H2O) is a polar molecule.
How many covalent bonds are present in a molecule of hydrogen (H2)?
How many shared electron pairs are there in a molecule of nitrogen gas (N2)?
Name one example of a diatomic molecule with a covalent bond.
Which of the following best describes a double covalent bond?
(1) Sharing of one pair of electrons
(2) Sharing of two pairs of electrons
(3) Sharing of three pairs of electrons
(4) Transfer of electrons
Which of the following best describes a molecule?
(1) A group of atoms held together by ionic bonds
(2) A group of atoms held together by covalent bonds
(3) A group of ions
(4) A single atom
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) No electrons are shared
Which of the following best explains why covalent compounds are often gases or liquids at room temperature?
(1) They have strong forces between molecules
(2) They have weak forces between molecules
(3) They are made of ions
(4) They have metallic bonds
Fill in the blank: Covalent bonds are generally formed between elements that are both ___ in the periodic table.
Fill in the blank: In a molecule of carbon dioxide (CO2), each oxygen atom forms ___ double bond(s) with the carbon atom.
Fill in the blank: In a single covalent bond, ___ pair(s) of electrons are shared between two atoms.
Fill in the blank: In a water molecule, the oxygen atom shares electrons with ___ hydrogen atoms.
True or False: Covalent bonds are directional, meaning the atoms are held together in specific orientations.
True or False: Covalent bonds are stronger than most ionic bonds.
True or False: Covalent bonds can be single, double, or triple bonds.
True or False: Covalent bonds can only form between atoms of the same element.
