Covalent Bonds Gizmo - Check for Understanding

In this model of a molecule of ammonia, NH₃, how many covalent bonds are represented?

• 1 covalent bond

• 2 covalent bonds

• 3 covalent bonds

• 4 covalent bonds

Tags

NGSS.MS-PS1-1

This image shows two nitrogen atoms. For these atoms to form a stable molecule, N₂, how many electrons would have to be part of covalent bonds?

• 0 electrons

• 2 electrons

• 4 electrons

• 6 electrons

Tags

NGSS.MS-PS1-1

How many covalent bonds are there in one molecule of carbon dioxide, CO₂?

• 0 covalent bonds

• 2 covalent bonds

• 4 covalent bonds

• 6 covalent bonds

Tags

NGSS.MS-PS1-1

Bromine is a halogen, one of the elements in the same column of the periodic table of elements as fluorine. Like fluorine, one bromine atom can form a diatomic covalent molecule with another bromine atom. Which of the images represents a stable molecule of bromine, Br₂? (Note: inner electrons have been hidden.)

• A

• B

• C

• D

Tags

NGSS.MS-PS1-1

Hydrogen cyanide is poisonous liquid that has a faint, almond-like smell. One molecule of hydrogen cyanide (HCN) is made up of one hydrogen atom, one carbon atom, and one nitrogen atom, shown in the image. Which of the answer choices shows the correct Lewis dot diagram for hydrogen cyanide?

• Diagram A

• Diagram B

• Diagram C

• Diagram D

Tags

NGSS.MS-PS1-1