Question #6d153

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Answer 1 · 2017-06-16T23:45:01

The answer is C. #""_9^19"F"#.

The nuclear equation is

#""_7^14"N" + ""_2^4"He" → ?#

The sum of the subscripts and of the superscripts must be the same on both sides of the equation.

Thus, the equation becomes

#""_7^14"N" + ""_2^4"He" → ""_9^18"X"#

Element 9 is fluorine, so the complete equation is

#""_7^14"N" + ""_2^4"He" → ""_9^18"F"#