Atoms, Molecules, and Ions: Exercises

• (1) refers to carbon monoxide, a molecule composed of one carbon and one oxygen atom.
• (2) refers to cobalt, a chemical element on the periodic table.

What is the difference between H₂O and H₂O₂ (hydrogen peroxide)?

• (1) represents a molecule of water, consisting of two hydrogen atoms bonded to one oxygen atom.
• (2) (hydrogen peroxide) represents a molecule of hydrogen peroxide, consisting of two hydrogen atoms bonded to two oxygen atoms.

1. (1) Hydrogen
2. (2) Nitrogen
3. (3) Oxygen
4. (4) Fluorine 
5. (5) Chlorine
6. (6) Bromine
7. (7) Iodine

1. (1) Dinitrogen Pentoxide
2. (2) Tetraboron Tricarbide
3. (3) Phosphorus Pentachloride

1. (1) Nitrogen Triiodide
2. (2) Diarsenic Trisulfide
3. (3) Iodine Trichloride

1. (1) dioxygen dichloride
2. (2) dinitrogen trisulfide
3. (3) xenon tetrafluoride

1. (1) Chlorine Dioxide
2. (2) Selenium Dibromide
3. (3) Dinitrogen Trioxide

1. (1) Iodine Trifluoride
2. (2) Xenon Trioxide
3. (3) Disulfur Decafluoride

1. (1) Germanium Dioxide
2. (2) Carbon Disulfide
3. (3) Diselenium Dibromide