Which of the following statements about hydrogen is/are correct?
1)It is a very low density gas.
2)Most stars consist primarily of hydrogen.
3)An atom of deuterium is about three times the mass of protium.
A) 1 only
B) 2 only
C) 3 only
D) 1 and 2
E) 1,2 and 3

Question

Quizplus · Accepted Answer

1) It is a very low density gas: This is true, as hydrogen gas has a very low atomic mass and is the lightest element on the periodic table.
2) Most stars consist primarily of hydrogen: This is also true, as hydrogen is the most abundant element in the universe and is the main fuel source for nuclear fusion reactions in stars.
3) An atom of deuterium is about three times the mass of protium: This is true, as deuterium contains one neutron in addition to its single proton, making it roughly three times more massive than protium (which has no neutron). However, this statement is not necessary to answer the question, as it refers only to a specific isotope of hydrogen.

Which of the Following Statements About Hydrogen Is/are Correct