The Sun consists of mostly which two elements?

The sun consists mostly of hydrogen and helium. This is because these two elements are the most abundant in the universe. Hydrogen makes up about 75% of the sun's mass, while helium accounts for around 24%. The intense temperature and pressure at the sun's core create a nuclear fusion process that converts hydrogen into helium, releasing a tremendous amount of energy in the form of light and heat. This is what sustains the sun's immense brightness and heat.