Question

Which of the following atoms have the same number of neutrons as an atom of Aluminum-27?

Answer 1

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B. Sulfur - 30 (14Neutrons)

Answer 2

Aluminum-27 has a mass, of course, of 27. (Mass is how many protons and neutrons in an atom). Aluminum-27 is an isotope, therefore only the amount of neutrons change and since the are 13 protons, there will be 14 neutrons. Now let's compare:
Silicon-27 would have 13 neutrons
Sulfur-30 would have 14 neutrons

The answer is B.Sulfur-30