The most commonly found element in the earth's crust is Oxygen.
Explanation:
The<u> atomic umber of Oxygen is 8</u>.The <u>electronic configuration</u> of oxygen is <u><em>2,6</em></u>.It belongs to the <u>chalcogen </u>family in the periodic table.It is a strong oxidizing agent and highly reactive non-metal.The amount of oxygen present in the earth's crust is 46.6%.The oxygen exists in two forms ,they are (oxygen) and (ozone).The major compound of it exists in the form of silicate minerals where it combines with other minerals.It also exists i the compound as carbonates and phosphates. Oxygen with acetylene is used to cut and weld the metals.In the medical field,Oxygen is used to ease the respiratory disease and it is also used to manufacture the the explosives.
Nobel gasses are not reactive and are the far right group on the periodic table. This is because they have a full valence electron shell which is the most stable electron configuration. Most reactions occur in order for an atom to fill its valence shell and since they already have a full valence shell there is no reason for them to react.
