Complete the following reactions with the appropriate Isotpic symbol by filling in the blank.
_{74}^{180}W\rightarrow_-?_-+_2^4He
74
180
W→
−
?
−
+
2
4
He
_{74}^{180}W\rightarrow_-?_-+_2^4He
74
180
W→
−
?
−
+
2
4
He