Calculating Alpha Decay Energy for A=210, Q=5Mev

[matt222]

Homework Statement

if the decay of nucleuse with A=210, what is the alpha energy emited when the Q of the decay is 5Mev

Homework Equations

The Attempt at a Solution

by energy and momentum conservation:

parent=daughter+alpha decay+Q

from the question the parent has A=210, in the table indicate Astatine (210-At), the daughter confused me, the parent should be taken off by A=210-4=206 And Z=85-2=83,

from the table should it be the daughter 206-Bi and z=83?

 

[phyzguy]

How did you conclude that it was At-210, and not something else (like Po-210 - this is far more likely)? But anyway, it doesn't really matter. If you know that the decay products have atomic weights of 206 and 4, just share 5 MeV between them and conserve momentum and you'll have your answer.