Question

238
U
92
+
Th
90
4
He
2
When radioactive uranium, or U-238, decays it emits an alpha particle and produces a nuclide of thorium. According to the nuclear
equation, what is the mass of the thorium produced?
A)
234
B)
238
C)
242
D)
244

Answer 1

Answer:

c) 242

Explanation:

you subtract 238-92= 146 then you add 146+90+4+2 that will give you 242