[nblu]

Hello, I've come across a question stated on the subject,
and I've gave it a try on the question but I'm not so sure whether I'm right or wrong.
I'd really appreciate if someone could correct it for me, thank you very much in advance.

232              4           228
 90 Th -----> 2 He  +    88 Ra

[cliverlong]

Hello, I've come across a question stated on the subject,
and I've gave it a try on the question but I'm not so sure whether I'm right or wrong.
I'd really appreciate if someone could correct it for me, thank you very much in advance.

232              4           228
 90 Th -----> 2 He  +    88 Ra

Hi

Mass number decreases by 4
Atomic number decreases by 2
Atomic numbers check against element symbols in Periodic Table


So it looks fine to me. So why do you think it might be wrong as you have doubt?

Clive