Question

The position of element $RaC$ in the periodic table is:
${}_{88}^{226}Ra{\stackrel{-\alpha }{\to }}_{86}Rn\stackrel{-\alpha }{\to }RaA\stackrel{-\beta }{\to }RaB\stackrel{-\alpha }{\to }RaC$

• A. ${13}^{th}$ group and $6^{th}$ period
• B. ${16}^{th}$ group and $3^{rd}$ period
• C. ${15}^{th}$ group and $7^{th}$ period
• D. ${15}^{th}$ group and $6^{th}$ period

Answer 1

The correct option is D ${15}^{th}$ group and $6^{th}$ period

${}_{88}^{226}Ra{\stackrel{-\alpha }{⟶}}_{86}Rn\stackrel{-\alpha }{⟶}RaA\stackrel{-\beta }{⟶}RaB\stackrel{-\alpha }{⟶}RaC$

${}_{88}^{226}Ra{\stackrel{-\alpha }{⟶}}_{86}Rn{\stackrel{-\alpha }{⟶}}_{84}RaA{\stackrel{-\beta }{⟶}}_{85}RaB{\stackrel{-\alpha }{⟶}}_{83}RaC$

Element with atomic number 83 lies in ${15}^{th}$ group and $6^{th}$ period.