# How do you balance nuclear fission equations?

##### 1 Answer

The sums of the superscripts and of the subscripts must be the same on each side of the equation.

Here are some links that show how to balance nuclear equations.

http://socratic.org/questions/how-do-you-balance-nuclear-equations?source=search

http://socratic.org/questions/how-do-you-complete-and-balance-nuclear-equations?source=search

http://socratic.org/questions/what-balanced-equation-represents-nuclear-fusion

**EXAMPLE**

Complete the following equation for the fission of uranium-235.

**Solution**

On the left hand side, sum of subscripts = 92 + 0 = 92

On the right hand side, sum of subscripts = 56 +

On the left hand side, sum of superscripts = 235 + 1 = 236

On the right hand side, sum of superscripts = 142 +

The symbol for a nucleus is

The element with

Thus, the unknown nucleus is

The balanced nuclear equation is