Question

question 11 (2 points)
most stars are made of which elements?
o a hydrogen and helium
o b hydrogen and sodium
o c hydrogen and lithium
o d hydrogen only

Explanation:

Stars are formed from nebulae (clouds of gas and dust). Through nuclear fusion in their cores, hydrogen is converted into helium. Most stars, like our Sun, have a composition dominated by hydrogen (about 70 - 75% by mass) and helium (about 24 - 28% by mass). Sodium and lithium are present in much smaller quantities. So, the main elements are hydrogen and helium.

Answer:

A. Hydrogen and Helium