Question

What type of radiation is emitted when polonium-212 forms lead-208?

Answer 1

A. An alpha particle.

Hope this helps :) ~

Answer 2

Answer: The radiation that is emitted from the above process is alpha particle.

Explanation:

Alpha decay is defined as the process in which alpha particle is emitted. In this process, a heavier nuclei decays into a lighter nuclei. The alpha particle released carries a charge of +2 units. The released alpha particle is also known as helium nucleus.

$_Z^A\textrm{X}\rightarrow _{Z-2}^{A-4}\textrm{Y}+_2^4\alpha$

Beta decay is defined as the process in which beta particle is emitted. In this process, a neutron gets converted to a proton and an electron. The released beta particle is also known as electron.

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

Gamma decay is defined as the process in which an unstable nuclei gives off excess energy by a spontaneous electromagnetic process and thus releases $\gamma -radiations$.

These radiations does not carry any charge and are electrically neutral.

$_Z^A\textrm{X}^*\rightarrow _Z^A\textrm{X}+_0^0\gamma$

The chemical equation for the decay of polonium-212 isotope follows:

$_{84}^{212}\textrm{Po}\rightarrow _{82}^{208}\textrm{Pb}+_2^4\alpha$

Hence, the radiation that is emitted from the above process is alpha particle.