Need help with Nuclear Reaction problems

I wasn't too sure how to write the problem without making it look really confusing so I ss'd this:

1. http://i49.tinypic.com/33mqywm.jpg

2. Electron capture of Rubidium-81

3. Positron Emission of Carbon-11

For 3, would it be Carbon but with 5 protons?

And what is the difference between emission and decay?

I had a problem where it asked for positron emission, and then another problem asked for positron decay. Are they the same thing?

1. 92 U 235 + 0n1 ===> 38 Sr 90 + 3 0n1 + 54 Xe 143

2. 37 Rb 81 + e- ===> 36 Kr 81

3. 6C11 ===> e+ + 5B11

Emission is the ejection of a particle. Decay is the conversion of one nuclide to another nuclide. Positron decay is decay by positron emission.