Question

In the core of a star, primarily two ________ nuclei fuse together to form __________.

• A. nitrogen; oxygen
• B. helium; hydrogen
• C. hydrogen; helium
• D. carbon; argon

Answer 1

The correct option is C hydrogen; helium

A star's energy is the result of a process known as thermonuclear fusion in which two hydrogen nuclei are combined together to form a helium nucleus, at extremely high pressure and temperature of about ${10}^7\text{K}$. During the fusion, an enormous amount of energy is released in the form of heat, light, and electricity.