Question

Approximately, what basic composition are all stars born with?

1) About 50
2) About 74
3) About 25
4) About 98

Answer 1

All stars are born with a composition predominantly consisting of hydrogen (about 75%) and helium (nearly 25%), totaling to about 96 to 99% of their mass, with the remaining mass made up of heavier elements.

Step-by-step explanation:

The basic composition with which all stars are born consists primarily of hydrogen and helium. Analyzing the detailed spectra of stars has revealed that hydrogen makes up about three-quarters of a star's mass, while helium constitutes nearly a quarter. Together, hydrogen and helium comprise between 96 to 99% of a star's mass, with heavy elements such as oxygen, carbon, neon, iron, nitrogen, silicon, magnesium, and sulfur making up the remainder. The exact proportion can be slightly higher than 99.9% in some stars. The content of heavy elements varies among stars, with population I stars like our Sun having 1-4% heavy elements and population II stars having much lower concentrations.