The most abundant element in the sun is .

Most abundant element in the Sun is Hydrogen.

Explanation:

Sun is the only star in our Solar system. The element which is present in abundance in Sun is hydrogen element.

Hydrogen element undergoes fusion process which leads to the formation of helium atom. This process results in the release of tons of energy in the form of heat.

The equations for the fusion process of hydrogen element is given by:

Overall reaction for the above series of reactions is given by:

Hence, most abundant element in the Sun is Hydrogen.

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This law, first proposed and tested by Émilie du Châtelet, means that energy can neither be created nor destroyed; rather, it can only be transformed or transferred from one form to another. or

Similarly, the law of conservation of energy states that the amount of energy is neither created nor destroyed.