- Approximately 75% of matter in the universe is believed to consist of hydrogen.
- The name for hydrogen comes from words meaning “Water forming”.
- Helium is the second most abundant element in the universe.
- Helium is a member of the noble gas
- Helium is a very light and inert gas.
- Noble gases are also known as “Inert gases”.
- Helium and Hydrogen both are lighter than air.
- A ductile element which is a good conductor of electricity is called
- Copper is used in the production of electric wires.
- Copper and Aluminum have no effect on magnet.