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CBSE Notes 2011-2012

The elements, A, B, C, D and E have atomic number 9,11, 17, 12 and 13 respectively. Which pair of el...

Multiple choice question

The elements, A, B, C, D and E have atomic number 9,11,
17, 12 and 13 respectively. Which pair of elements belong
to the same group ?

unknown

A and B

unknown

B and D

unknown

A and C

unknown

D and E