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Byju's Answer
Standard X
Chemistry
Groups and Periods
The element t...
Question

The element that doesn't belong to the same group as that of potassium is

A
Li
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B
Na
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C
Cs
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D
Mg
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Solution

The correct option is D Mg
Lithium (Li), sodium (Na), potassium (K) and caesium (Cs) contain one valence electron each and belong to group 1, while magnesium (Mg) contains two valence electrons and belongs to group 2 of the periodic table.
Hence, the correct answer is option (d).

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