Hydrogen

Hydrogen is the lightest and most abundant chemical element in the universe. It's a colorless, odorless gas that's essential for life.

Think of it like this:

• Hydrogen is the basic building block of the universe.
• It's a part of water (H₂O), stars, and many other things.

Examples of where hydrogen is found:

• Water: Two hydrogen atoms combine with one oxygen atom (H₂O)
• The Sun and stars: are mostly made of hydrogen
• Organic compounds: Hydrogen is in most molecules that make up living things.
• Hydrogen fuel: a potential clean-energy source.

Etymology:

The word "hydrogen" comes from Greek:

• "hydro," meaning "water."
• "genes," meaning "forming."

So, hydrogen literally means "water-forming" because when it combines with oxygen, it creates water!