Here are some common elements we use every day: - Carbon - found in pencils, food, plastics - Oxygen - we breathe it - Hydrogen - found in water - Nitrogen - in the air we breathe - Calcium - in our bones and teeth - Sodium - in salt - Chlorine - in drinking water and swimming pools - Aluminum - used in cans and foil - Copper - in wiring and plumbing - Iron - in foods and construction materials - Zinc - in galvanization and supplements - Iodine - added to salt for thyroid health