Elements:
* Gold (Au): Found in jewelry, electronics, and some dental fillings.
* Silver (Ag): Used in jewelry, silverware, and photography.
* Copper (Cu): Used in wiring, plumbing, and coins.
* Iron (Fe): Used in construction, tools, and cooking utensils.
* Oxygen (O2): The gas we breathe.
* Nitrogen (N2): Makes up the majority of the air we breathe.
* Carbon (C): Found in diamonds, graphite (pencil lead), and organic compounds.
* Diamond (C): A pure form of carbon, prized for its hardness and brilliance.
* Helium (He): Used in balloons and MRI machines.
Compounds:
* Water (H2O): Essential for life.
* Table Salt (NaCl): Used for flavoring food.
* Sugar (C12H22O11): Sweetener.
* Baking Soda (NaHCO3): Used in baking and as a cleaning agent.
* Vinegar (CH3COOH): A weak acid used in cooking and cleaning.
* Ethanol (C2H5OH): Found in alcoholic beverages.
* Glucose (C6H12O6): A simple sugar found in fruits and honey.
Important Note: It's important to remember that even "pure" substances can contain trace amounts of impurities. For example, tap water is not pure H2O, but contains minerals and other substances.
