Refer to a periodic table and tell how many helium atoms (He)would be needed to get close to the same mass as an average oxygen atom (O).
A)six
B)four
C)twelve
D)one-fourth

Question

Quizplus · Accepted Answer

An average oxygen atom has an atomic mass of approximately 16 atomic mass units (amu), while a helium atom has an atomic mass of about 4 amu. Therefore, four helium atoms (4 x 4 amu = 16 amu) would be needed to get close to the same mass as an average oxygen atom.

Refer to a Periodic Table and Tell How Many Helium