The Sun is composed almost entirely of two gases. They are hydrogen and___________ .
A) helium
B) xenon
C) argon
D) magnesium

Name: The Sun is composed almost entirely of two gases. They are hydrogen and___________ . A) helium B) xenon C) argon D) magnesium
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The Sun is composed almost entirely of hydrogen (about 71% of its mass) and helium (about 27% of its mass). Xenon, argon, and magnesium are present in much smaller amounts.

The Sun Is Composed Almost Entirely of Two Gases