Covalent Bonding Review (Honors)

Which of the following pairs of elements is most likely to form a covalent compound?

• Calcium and bromine

• Sulfur and lithium

• Phosphorous and oxygen

• Sodium and aluminum

How many shared pairs of electrons are in the molecule NH₃?

• 2

• 3

• 4

• 6

Which of the following elements can form a diatomic molecule held together by a triple covalent bond?

• Carbon

• Nitrogen

• Fluorine

• Oxygen

Tags

NGSS.HS-PS1-1

A molecule with a single covalent bond is

• CO₂

• N₂

• Cl₂

• CO

How do atoms achieve a full octet in a single covalent bond?

• Two atoms share two electrons

• Two atoms share two pairs of electrons

• One atom completely loses electrons to the other atom in the bond.

Tags

NGSS.HS-PS1-1

How many bonds are there in a triple covalent bond?

• 1

• 3

• 6

• 9

Chlorine belongs to group 17/7A. How many covalent bonds are formed between two chlorine atoms?

• 1

• 2

• 3

• 4

Tags

NGSS.HS-PS1-1

What characteristic of metals make them good conductors of electricity?

• Their crystal structures can be rearranged easily

• They have mobile cations

• They have mobile protons

• They have mobile valence electrons

Tags

NGSS.HS-PS2-5

Which of the following molecules contains a double covalent bond?

• NH₃

• H₂S

• Cl₂O

• CO₂

Tags

NGSS.HS-PS1-1

Why do atoms share electrons in covalent bonds?

• to become ions and attract each other

• to become more polar

• to attain a noble-gas configuration

• to increase their atomic number