Covalent Bonding

Mono-

1 → CO → *carbon monoxide*

Di-

2 → CO₂ → *carbon dioxide*

Tri-

3 → N₂O₃ → *dinitrogen trioxide*

Tetra-

4 → CCl₄ → *carbon tetrachloride*

Penta-

5 → P₂O₅ → *diphosphorus pentoxide*

Hexa-

6 → SF₆ → *sulfur hexafluoride*

Hepta-

7 → ICl₇ → *iodine heptachloride*

Octa-

8 → SeF₈ → *selenium octafluoride*

Nona-

9 → As₄S₉ → *tetraarsenic nonasulfide*

Deca-

10 → P₄O₁₀ → *tetraphosphorus decoxide*

Hydrogen

Symbol (Always Diatomic): H₂. Found as gas: *H₂*

Oxygen

Symbol (Always Diatomic): O₂. Found as gas: *O₂*

Fluorine

Symbol (Always Diatomic): F₂. Pale yellow gas: *F₂*

Bromine

Symbol (Always Diatomic): Br₂. Red-brown liquid: *Br₂*

Iodine

Symbol (Always Diatomic): I₂. Purple solid: *I₂*

Nitrogen

Symbol (Always Diatomic): N₂. Colorless gas: *N₂*

Chlorine

Symbol (Always Diatomic): Cl₂. Greenish gas: *Cl₂*