How Do You Calculate m3 and m4 in Nuclear Reaction Equations?

[kokolo]

Homework Statement

I need to prove that number of nucleons is same before and after the reaction.

Relevant Equations

10B(n,α)7Li+ 2.8MeV

En=0 Ek(B)=0 Q=Ek3(α)+Ek4(Li) --Q=Ek3(1+m3/m4) (1)
p3=p4 /^2 -- 2*m3*Ek3=2*m4*Ek4 --- Ek4=m3/m4 * Ek3 (2)
(1) and (2) Ek4= m3/(m3+m4) * Q, but I'm not sure how to find m3 or m4 and if this is true

 

[kuruman]

"I need to prove that number of nucleons is same before and after the reaction" is not a problem statement. It is an expression of your need. Please post the problem statement as was given to you and be sure to include the reaction.

 

[Astronuc]

Homework Statement: I need to prove that number of nucleons is same before and after the reaction.
Relevant Equations: 10B(n,α)7Li+ 2.8MeV

En=0 Ek(B)=0 Q=Ek3(α)+Ek4(Li) --Q=Ek3(1+m3/m4) (1)
p3=p4 /^2 -- 2*m3*Ek3=2*m4*Ek4 --- Ek4=m3/m4 * Ek3 (2)
(1) and (2) Ek4= m3/(m3+m4) * Q, but I'm not sure how to find m3 or m4 and if this is true

What are "number of nucleons" in ¹⁰B, n, the α-particle, and ⁷Li?

 

[kokolo]

 

[kuruman]

How do you interpret what you posted in #4?
What do you have before the reaction?
What do you have after the reaction?

Also, when you write ₅B¹⁰, what do the numbers "5" and "10" stand for?