When neptunium (Np) and plutonium (Pu) were discovered, the per... | Filo

An isotope of neptunium (Np-240) has a half-life of 65 minutes. If the decay of Np-240 is modeled by the differential equation d y / d t=-k y, where t is measured in minutes, what is the decay constant k ?

(III) The americium nucleus, ^24195Am decays to a neptunium nucleus, ^23793Np by emitting an alpha particle of mass 4.00260 u and kinetic energy 5.5 MeV. Estimate the mass of the neptunium nucleus, ignoring its recoil, given that the americium mass is 241.05682 u. | Numerade