Question

${}_{86}^{219}Rn$ is a member of actinium series. Another member of same series is:

• A. ${}_{92}^{235}U$
• B. ${}_{89}^{222}Ac$
• C. ${}_{90}^{212}Th$
• D. ${}_{84}^{212}Po$

Answer 1

The correct option is A ${}_{92}^{235}U$

Actinium series consists of

Parent element ${}_{92}^{235}U$

Prominent element ${89}^{{AC}^{227}}$

End product ${82}^{{Pb}^{207}}$