The relative abundance of chemical elements are shown by atomic mass number. Of those shown, which is the most abundant
A)hydrogen
B)helium
C)carbon
D)iron

Name: The relative abundance of chemical elements are shown by atomic mass number. Of those shown, which is the most abundant A)hydrogen B)helium C)carbon D)iron
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Question

The relative abundance of chemical elements are shown by atomic mass number. Of those shown, which is the most abundant 
A)hydrogen 
B)helium 
C)carbon 
D)iron

Quizplus · Accepted Answer

Hydrogen is the most abundant element in the universe, making up approximately 75% of all baryonic mass.

The Relative Abundance of Chemical Elements Are Shown by Atomic