Why Hydrogen is so important?

Hydrogen is the lightest of all gases. ✅ (Correct – Hydrogen is the lightest element and gas.)

Hydrogen can be found in water. ✅ (Correct – Water (H₂O) contains hydrogen.)

Hydrogen is not a greenhouse gas. ✅ (Correct – Molecular hydrogen (H₂) does not trap heat like CO₂ or CH₄.)

Hydrogen is odorless. ✅ (Correct – Hydrogen has no smell.)

Hydrogen is non-toxic. ✅ (Correct – Hydrogen itself is not toxic.)

Hydrogen may be naturally produced underground. ✅ (Correct – Natural hydrogen deposits exist, and geological processes can produce it underground.)

Hydrogen can be made from fossil fuels. ✅ (Correct – Hydrogen is often produced from natural gas via steam methane reforming.)

Hydrogen can be stored as a gas or in liquid form. ✅ (Correct – Hydrogen can be stored as compressed gas or cryogenic liquid.)

Hydrogen can be used to generate electricity. ✅ (Correct – Hydrogen fuel cells generate electricity through electrochemical reactions.)

Hydrogen is used in the production of ammonia for fertilizers. ✅ (Correct – The Haber process uses hydrogen to make ammonia (NH₃) for fertilizers.)

 Hydrogen and helium

• Hydrogen makes up about 92% of the sun's mass, while helium makes up about 8%. 
• Hydrogen and helium are the most abundant elements in the sun. 
• The hydrogen and helium in the sun are in a plasma state due to the high temperatures and pressures. 

Other elements

• The sun also contains small amounts of oxygen, carbon, nitrogen, neon, iron, silicon, magnesium, and sulfur. 
• These heavier elements play an important role in the sun's physical processes. 

Helium's name

• Helium is named after Helios, the Greek Titan of the sun. 
• Helium is the second simplest atom to model in quantum mechanics.