The number 87 when referred to francium is that element's atomic number. The most common isotope of francium is 223, which has a half-life of 22 minutes and decays by beta-negative emission into radium-223.
The equation for the beta decay of 12B is: 512B --> 612C + -10e
where the e is an electron or negative beta particle.
10B(n,alpha)7Li
137Cs -> 137Xe + -1e- + ve
Pb-212
ncxc
The equation for the beta decay of 24Na is: 1124Na --> 1224Mg + -10e where the e is a negative beta particle or electron.
The equation for the beta decay of 17F: 917F --> 817O+ 10e + ve where the 10e is a positive beta particle or positron.
The equation for the beta decay of 3H is: 13H --> 23He + -10e where -10e represents a negative beta particle or electron.
Plutonium-241 decays by both beta- and alpha decay. For beta- decay the equation is ...94241Pu -> 95241Am + e- + v-eNot asked but answered for completeness sake, for alpha decay the equation is ...94241Pu -> 92237U +24He2+
The equation for the beta decay of 97Zr is: 4097Zr --> 4197Nb + -10e representing the beta particle as -10e.
The equation for the beta decay of 86Rb:3786Rb --> 3886Sr+ -10e where the -10e represents a beta particle or electron.
ncxc
The equation for the beta decay of 24Na is: 1124Na --> 1224Mg + -10e where the e is a negative beta particle or electron.
The equation for the beta decay of 75Se is:3475Se --> 3375As + 10e where the 10e is a positive beta particle or positron.
The equation for the beta decay of 32Si is: 1432Si --> 1532P + -10e where -10e represents a negative beta particle or electron.
The equation for the beta decay of 17F: 917F --> 817O+ 10e + ve where the 10e is a positive beta particle or positron.
The equation for the beta decay of 3H is: 13H --> 23He + -10e where -10e represents a negative beta particle or electron.
The equation for the beta decay of 14C: 614C --> 714N + -10e where the e is an electron.
The equation for the beta decay of 24Na is: 1124Na --> 1224Mg + -10e where the e is a negative beta particle or electron.
Uranium-239 does NOT decay by alpha decay, it decays only by beta and gammadecay.
There are three beta decay modes for 40K, and so three equations. The equation for the negative beta decay of 40K: 1940K --> 2040Ca + -10e where the -10e represents a beta particle or electron. The equation for the positive beta decay of 40K: 1940K --> 1840Ar+ 10e where the 10e represents a positive beta particle or positron. The equation for the decay of 40K by electron capture is:1940K + -10e --> 1840Ar + ve