yes it is the lightest compound
very light explosive with oxegen.
hydrogen
helium or hydrogen
Light gases such as helium and hydrogen are found in the exosphere layer of the Earth's atmosphere. The exosphere is the outermost layer and consists of very low-density gases that extend out into space.
Hydrogen is lighter than the air around it, which creates a buoyant force that causes the balloon to float. This is due to the differences in density between hydrogen gas and the surrounding air.
When light passes through a hydrogen cloud in the universe, the hydrogen atoms can absorb certain wavelengths of the light. This absorption can create dark absorption lines in the spectrum of the light, revealing information about the composition and temperature of the cloud.
First take test tube (an empty test tube) hydrogen is colorless ,tasteless and odorless. (it is also very light that why weather balloons are filled with hydrogen). Then put a burning splint at the mouth of the test tube and you know that there is hydrogen in the air because hydrogen burns with a pop when it is mixed with air so now you know that there is hydrogen in the air.
Hydrogen is very light material. Oxygen can be found in rocks. If you are equiped with hydrogen cyllinder and have an energy origine (e.g. solar) to produce oxygen from rocks - combining them will make water
It's very light (only hydrogen gas is less dense than helium), it's relatively cheap, and (most importantly) it's not flammable (hydrogen gas is--the Hindenburg was filled with hydrogen gas).
The color of a hydrogen flame is typically light blue.
Heavy water is heavier than light water because instead of both hydrogen atoms in the molecule being ordinary light hydrogen (H - one proton) one or both hydrogen atoms are heavy hydrogen (D - one proton, one neutron).
When hydrogen peroxide is exposed to light or heat, it decomposes into water and oxygen gas.