When carbon-14 undergoes beta decay, it becomes which of the following? oxygen-13 + a beta particle nitrogen-14 + a beta particle carbon-13 + a beta particle boron-14 + a beta particle?

nitrogen-14 + a beta particle

Explanation: General representation of an element is given as:

where,

Z represents Atomic number

A represents Mass number

X represents the symbol of an element

Beta-decay: In this process, a neutron gets converted into a proton and an electron releasing a beta-particle. The beta particle released carries a charge of -1 units and no mass.

considering the question as per the attachment

here we can see that the radon nuclide has 222 as the atomic mass number and 86 as the atomic number.

when it undergoes nuclear fission it gives polonium which has atomic mass number as 218 and atomic number will be 84 along with a helium nucleus which has 4 atomic mass number and 2 as its atomic number.

222 = 218 + 4 (atomic mass number)

86 = ? + 2; therefore ? = 86-2 = 84.

the atomic mass number of polonium will be 84.