* Hydrogen (H): The lightest and most abundant element in the universe.
* Helium (He): Used in balloons and as a coolant in MRI machines.
* Nitrogen (N): Makes up about 78% of the Earth's atmosphere.
* Oxygen (O): Essential for respiration and combustion.
* Fluorine (F): Used in toothpaste and other products.
* Neon (Ne): Used in neon signs and lasers.
* Chlorine (Cl): Used in disinfectants and bleach.
* Argon (Ar): Used in welding and lasers.
* Krypton (Kr): Used in fluorescent lamps.
* Xenon (Xe): Used in flash lamps and lasers.
It's important to note that some elements can exist in different states depending on temperature and pressure. For example, water (H₂O) is a liquid at room temperature, but it can also be a solid (ice) or a gas (steam).
