Hydrogen

I learned about Hydrogen in my Science chemistry, it's an Alkali Metal too. I'm curious about it because there's an equation which is: metal + water = metal hydroxide + hydrogen. The metal can be one of the Alkali metal. For example, the metal is Sodium, so the equation becomes Sodium + water = Sodium hydroxide + hydrogen.

Hydrogen is here in the Periodic Table:

Hydrogen can be found in the sun, plants and sugar, blowtorches, water, etc. They can be either useful, and dangerous at the same time. 

The uses:

- As our body are mostly made out of water, we need Hydrogen (water/ H2O) to build energy in us.

- Transportation: It can be used as fuel, because it has a quick-burn character.

In the early 1900s, the LZ 129 Hidenburg, a hydrogen-filled passenger airship caught on fire due to the hydrogen, and crashed, killing 35 of the 97 people aboard and one ground crew member. 

http://www.historyinanhour.com/2011/05/06/the-hindenburg-disaster-summary/

That's why we have to be careful in using Hydrogen as fuel.