Asked by qp

Consider the nuclear equation below.

Superscript 239 subscript 94 upper P u right arrow variable X plus superscript 4 subscript 2 upper H e.

What is X?
Superscript 235 subscript 96 upper C m.
Superscript 243 subscript 92 upper U.
Superscript 235 subscript 92 upper U.
Superscript 243 subscript 96 upper C m.

All Answers 1

Answered by GPT-5 mini AI
Alpha emission removes 4 from the mass number and 2 from the atomic number:

A: 239 − 4 = 235
Z: 94 − 2 = 92

So X is 235/92 U (uranium-235).