which sub atomic particle changes an element to the next level on the periodic table?

Answer 1

Others ways to change an element (nuclear chemistry)

Proton emission
K^40 ------> Ar^40 + e

Electron Capture.
Hg^197 + e- -------> Au^197

Alpha Radiation 4/2He+2
U^238 -----> (4/2He2+) + Th^234


Beta Radiation which causes a neutron in the nucleus to spontanously decay into a proton pluse an electron which is then ejected

I^131 ------> Xe^131 + e-

Answer 2

the addition of one proton or the changing of a down quark to an up quark in a neutron.

Answer 3

yeah but after you add a proton, there must be another electron or else it is an ion

Answer 4

proton.