In this equation 2mg+o2=2mgo what is the subscript of the oxygen molecule

The subscript of the O₂ molecule is the small “2” at the lower right-hand corner of the “O”.

Explanation:

A subscript is a letter or a number that is written below the line.

In chemistry, a subscript after an atomic symbol tells you how many of those atoms are in the unit.

Thus, the subscript in O₂ tells you that there are two oxygen atoms in a molecule of oxygen.

alkaline metals are lithium, sodium, rubidium, potassium, cesium and francium.

alkali metals have electronegativity from 0.7 to 1, lowest in periodic table of elements, which means that alkali metals (i group in periodic table) has positive oxidation number in compounds.

electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

alkaline metals (far left in main group) have lowest ionizations energy and easy remove valence electrons,

for example, potassium is the alkali metal and has a single valence electron in the outer electron shell.

electron configuration of potassium is: ₁₉k 1s²2s²2p⁶3s²3p⁶4s¹.

they can not exist alone in nature, because they are very reactive.

20 drops hope this