There are several isotopes of nobelium, and of those, several decay by alpha decay. I picked the one with the longest known half-life, nobelium-259, at 58 minutes. I did not consider nobelium-261, or -263, which are expected to be longer, because they have yet to be synthesized in the lab.
102259No --> 75% alpha --> 100255Fm + 24He2+
Nobelium-259 also decays by electron capture / beta+ with an incidence of about 25%. The NNDC database also states a spontaneous fission rate of less than 10%. That does not add up, but that's what the database says. I think the ambiguity is due to the relatively short half-life of the element and the difficulty in synthesizing and observing it.
92Au 282Xe +13S
By alpha decay polonium-214 is transformed in lead-210. Po-214--------------alpha--------------Pb-210
Radon-198 does not decay via beta decay. It is thought to decay by alpha decay, but that is not certain. The equation would be ... 86198Rn -> (Alpha, T1/2 = 86 ms) -> 84194Po + 24He2+
Th-230(alpha)Ra-226.
The equation for the alpha decay of 210Po is: 84210Po --> 82206Pb + 24He representing the alpha particle as a helium nucleus. 206Pb, the daughter atom, is stable.
The equation for the alpha decay of 226Ra: 88226Ra --> 86222Rn + 24He The alpha particle is represented as a helium (He) nucleus.
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 alpha decay of 233Pu:94233Pu --> 92229U + 24He2+where the alpha particle is represented as a helium nucleus.Note that 233Pu decays by alpha decay with a probability of only 0.12%. The other 99.88% is Beta+ decay.
Lead-210 decays by alpha or beta decay. The equation for the alpha decay of 210Pb is: 82210Pb --> 80206Hg + 24He representing the alpha particle as a helium nucleus. The equation for the beta decay of 210Pb is: 82210Pb --> 83210Bi + -10e where the -10e is an electron.
There is no equation. Calcium-42 is stable and does not decay. Calcium is also much to light for alpha decay, which requires elements heavier than nickel, so no isotope of calcium undergoes alpha decay.
Uranium-239 does NOT decay by alpha decay, it decays only by beta and gammadecay.
The equation for the alpha decay of 265Bh is:107265Bh --> 105261Db + 24He where the 24He is an alpha particle or helium nucleus.
The equation for the alpha decay of 213At: 85213At --> 83209Bi + 24He where the alpha particle is represented as a helium nucleus.
92Au 282Xe +13S
The equation for the alpha decay of 222Rn is: 86222Rn --> 84218Po + 24He Where He represents the alpha particle, which can also be viewed as a Helium nucleus.
Mercury-201 is stable and does not decay.
parent element