The mass number, atomic number and group in the periodic table for RaC in the following change will be :
$_{88} R a^{226} - α \to R n - α \to R a A - β \to R a B - α \to R a C$

Atomic number = 83; mass number = 214; group is V

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Atomic number = 81; mass number = 211; group is V

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Atomic number = 82; mass number = 212; group is IV

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Atomic number = 80; mass number = 213; group is IV

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Solution

The correct option is B Atomic number = 83; mass number = 214; group is V
$_{88} R a^{226} - α \to R n - α \to R a A - β \to R a B - α \to R a C$
$\begin{matrix} _{88} R a^{226} & - α \to & _{86} R n^{222} & - α \to & _{84} R a A^{218} & - β \to & _{85} R a B^{218} I f g r o u p & Z e r o g r o u p & V I g r o u p & V I I g r o u p - α \to_{83} R a C^{214} V g r o u p \end{matrix}$
Atomic number of RaC = 83
Mass number of RaC = 214
Group of element RaC isV from configuration 2, 8, 18, 32, 18, 5
The number of electrons in outer shell suggest for group

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