Question

If an atom of sodium combines with (captures) an alpha particle that has 2 protons and 2 neutrons, its new mass number will be

A)
13 amu
B)
15 amu
C)
25 amu
D)
27 amu

Answer 1

D 27 amu

Step-by-step explanation:

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Answer 2

The mass of sodium is 23 and the mass of the absorbed alpha particle is 4. The mass:
23 + 4
= 27
The answer is D, 27 amu.