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Choose from the following ""(6)C , ""(...

Choose from the following
`""_(6)C , ""_(8)O, ""_(10)N e, ""_(11)Na, ""_(14)`Si
a] Elements that should be in the same period
b] elements that should be in the same group State reason for your selection in each case.

Text Solution

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`""_(6) C,_(8) O,_(10) Ne` are in same period, Le `2^(nd)` period as they have two shells. nNa and `14_Si` are in same period i.e., `3^(rd)` period as they have three shells.
`""_(6) C,_(14) Si` are in same group because they have same number of valence electrons i.e, four.
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