Question

What elements are present in a star? How do they interact in order to form light and heat?

Answer 1

A star'score is the source of its energy created by nuclear fusion that generates light and heat.. The core elements are hydrogen and helium. Quite many other elements form only 2% of mass..

Explanation:

The core temperature of a star might be from `5 M ^o C - 15 M ^o C`. Being away from us by several light years ( 1 light year = 62900 X (Earth-Sun distance), nearly), these star giants are seen as point source of light.

The nearest star is our star Sun and this is the only star seen as a disc. Sun's central temperature might be of the order `15 M ^o C` and this sufficient to sustain nuclear fusion. Hydrogen shares nearly 75% of solar mass. About 25% is helium. The other elements like oxygen, neon, nitrogen, carbon, iron, silicon, magnesium and sulfur might form a few % of the mass..