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The number of electrons in an element X is 15 and the number of neutrons is 15 and the number of neutrons is 16.

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The number of electrons in an element X is 15 and the number of neutrons is 15 and the number of neutrons is 16. Which of the following is the correct representation of the element? 

(A) 3115X

(B) 3116X

(C) 1516X

(D) 1615X

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The answer is (A) 3115X

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