Question

23491pa undergoes beta decay. what is the mass number of the resulting element?

Answer 1

234 is the mass number of the resulting element that is uranium.

Step-by-step explanation:

Beta-decay is nuclear process in which a neutron gets converted into a proton and an electron releasing a beta-particle. The beta particle released carries a charge of -1 units.

`_Z^A\textrm{X}\rightarrow _(Z+1)^A\textrm{Y}+_(-1)^0\beta`

So, when protactinium-234 undergoes beta decay to form uranium-234 as resultant element.

The reaction can be expressed as:

`_(91)^(234)\textrm{Pa}\rightarrow _(92)^(234)\textrm{U}+_(-1)^0\beta`

234 is the mass number of the resulting element that is uranium.

Answer 2

Answer is: mass number is 234.
Beta decay is radioactive decay in which a beta ray and a neutrino are emitted from an atomic nucleus.
There are two types of beta decay: beta minus and beta plus. In beta minus decay, neutron is converted to a proton and an electron and an electron antineutrino and in beta plus decay, a proton is converted to a neutron and positron and an electron neutrino, so mass number does not change.