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  3. The atomic numbers of three elements A, B and C are 12, 18 and 20 respectively. State, giving reason, whichtwo elements will show similar properties

. The atomic numbers of three elements A, B and C are 12, 18 and 20 respectively. State, giving reason, whichtwo elements will show similar properties

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periodic table

Elements A and C will show similar properties as both have same number  of valence elements

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