neutral to litmus

Hydrogen is odarless

It's the lightest gas known

it is lighter than air

thx guyz

hydrogen is colorless, odorless and tastelesss

thxanks 

also hydrogen react with oxygen slowly to produce water

4.It burns with a blue flame

5.It does not react with other elements at room temperature

6.combines with other chemical substances at high temperature

Please; can you help me with my biology question

I am new too but chemical properties of hydrogen are

1. react with metal chloride to give metal and hydrogen chloride example; iron chloride react hydrogen =iron and hydrogen chloride
2. burns with metal to form metal hydroxide. example; sodium react with hydrogen =sodium hydroxide