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An atom was observed with +3 charge, n = 38, and e = 28. What is the mass number of the atom?

A. 66
B. 69
C. 72
D. 63

User Stirredo
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1 Answer

9 votes

Answer: 66

Explanation: To find the mass number you would have to add the number of protons and the number of neutrons.

User Fahid Mohammad
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