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Question

The mass number, atomic number and group in the periodic table for RaC in the following change will be :
88Ra226αRnαRaAβRaBαRaC

A
Atomic number = 83; mass number = 214; group is V
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B
Atomic number = 81; mass number = 211; group is V
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C
Atomic number = 82; mass number = 212; group is IV
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D
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
88Ra226αRnαRaAβRaBαRaC
88Ra226α86Rn222α84RaA218β85RaB218IfgroupZerogroupVIgroupVIIgroupα83RaC214Vgroup
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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