Covalent Bonds Gizmo

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

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

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

4. 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 following images represents a stable molecule of bromine, Br2?

5. 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 below. Which of the answer choices shows the correct Lewis dot diagram for hydrogen cyanide?