Question

$4n+2$ series is known as:

• A. actinium series
• B. thorium series
• C. uranium series
• D. neptunium series

Answer 1

Answer: (C)

uranium series

Radioactive heavy nuclei decay by a series of $\alpha$- and $\beta$-emissions, finally resulting in the formation of a stable isotope of lead.

$\Rightarrow$4n+2 series is known as uranium series.

$\bullet$Uranium is the parent element of this series.

$\bullet$238 $\Rightarrow$ 4(59)+2 $\Rightarrow$ n =59.