Nobelium 102 emits a ganna Ray,what element results

Question

Need to show the equation used to figu this problem out.

Answer 1

So, a gamma ray is essentially a helium nucleus 

Nobelium 102 is not an isotope.  The 102 refers to the atomic number.  The isotope would be Nobelium-254, Nobelium-250, Nobelium 264, etc.

When you find the correct isotope, it will emit a helium nucleus and a new element with a mass 4 less and a number 2 less, if it exists at all.