C5 Brief Notes

C5 – Chemicals of the Natural Environment

• Dry air is a mixture of gases

• Molecular substances have low melting and boiling points

• Covalent bonds – sharing electrons

• The earth’s hydrosphere is the oceans

• Solid ionic compounds form crystals

• Ionic compounds have high melting and boiling points

• Ionic compounds conduct electricity when dissolved or molten

• Hydrochloric acid can help detect carbonates

• The earth’s lithosphere…