Mass numbers of atoms of an element are 1, 2, 3 respectively. Identify

1.	Mass numbers of atoms of an element are 1, 2, 3 respectively. Identify the element.
A.	Beryllium
B.	Lithium
C.	Hydrogen
D.	Helium
Answer» D. Helium

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Mass numbers of atoms of an element are 1, 2, 3 respectively. Identify the element.

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