Generally, what you’re looking for is a map of nuclides; here is a somewhat humongous example (around 4MB). Number of protons is on the vertical, neutrons on the horizontal axis, so all nuclides in one row are isotopes (equal proton number) of one element, all in one column are isotones (equal neutron number), and all along the upper-left to lower-right diagonal are isobars (equal mass number).
It’s especially useful for tracking decay chains, since it notes which kind of decay any given nuclide undergoes (in this case, yellow for alpha, blue for beta+ and pink for beta-; gamma decay doesn’t result in nuclear transmutation, being just the emission of electromagnetic radiation).
To find out what the end product of any given decay is, all you have to do is count:
For alpha decay, which is the emission of a [sup]4[/sup][sub]2[/sub]He - nucleus, the decay is:
[sup]A[/sup][sub]Z[/sub]N —> [sup]A-4[/sup][sub]Z-2[/sub]N* + [sup]4[/sup][sub]2[/sub]He
Meaning that to find the daughter nucleus of an alpha-decaying nuclide on the map, you go down two rows, and left two columns, corresponding to ‘losing’ two protons and two neutrons.
For beta+ decay, emission of a positron (and an electron-neutrino, but that doesn’t change anything), the decay is:
[sup]A[/sup][sub]Z[/sub]N —> [sup]A[/sup][sub]Z-1[/sub]N* + e[sup]+[/sup] ( + v[sub]e[/sub])
So, on the nuclide map, you go down one row, and right one column, corresponding to one proton being transformed into a neutron.
For beta- decay, emission of an electron (and an electron-antineutrino), the decay is:
[sup]A[/sup][sub]Z[/sub]N —> [sup]A[/sup][sub]Z+1[/sub]N* + e[sup]-[/sup] ( + !v[sub]e[/sub])
So, on the nuclide map, you go up one row, and left one column, corresponding to one neutron being transformed into a proton.