Hydrogen Test - 2

As Hydrogen has 1 electron which fills in orbital of s subshell of First Shell.

H properties matches with alkali metal as well as halogens so it is placed separately

NaH

NaH + H₂O → NaOH + H₂↑

Due to unfavourable neutron to proton ratio, tritium emits low energy beta particles.

Hydrogen

KH + H₂O → KOH + H₂↑ 

The name ‘gas giant’ was coined in 1952 by science fiction writer James Blish to refer to all the giant planets. The giant planets (Jupiter and Saturn) are huge gas balls, which is quite different than Earth and and other three rocky inner planets. Gas giants are primarily composed of gases, such as hydrogen and helium, and a much thicker layer of metallic hydrogen, along with a molten rocky core.

Unlike rocky planets, gas giants do not have a well-defined surface, and there is no clear boundary between where the atmosphere ends and the surface begins. In other words, you wouldn’t be able to land on these planets, as their atmospheres simply become gradually denser towards the core, perhaps with liquid or liquid-like states somewhere in between.

In the combined form it constitutes 15.4% of the earth crust and the ocean.

Deuterium, (D, or ²H), also called heavy hydrogen, isotope of hydrogen with a nucleus consisting of one proton and one neutron, which is double the mass of the nucleus of ordinary hydrogen (one proton). Deuterium has an atomic weight of 2.014.

A mixture of CO and H₂ in any ratio is called synthesis gas or syn gas as it is used in synthesis of methanol and a number of hydrocarbon.

The formation of water from it's elements produces, in addition to water, a tremendous amount of energy, 572 kJ to be exact.

2H₂ + O₂ → 2H₂O + ENERGY

This is an example of an exothermic reaction, a reaction that produces energy. It is also an example of what is called a combustion reaction, where a substance (in this case hydrogen gas) is combined with oxygen.