What type of element is present in a supernova gas cloud that is not present in a smaller star like our sun?

Question 19 options:

A)

Hydrogen

B)

Gold

C)

Helium

D)

Carbon

answer; the correct answer is (beta)

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds