Posted by jim on Wednesday, April 28, 2010 at 2:58pm.
Written this way, 15P^32 means 15 atomic number (which is phosphorus) and ^32 means mass number.
15P^32 ==> -1e^0 + X
The subscripts must add up on both sides as does the mass number; therefore, X will be 16X^32. What is 16X^32.
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