Chemistry, asked by vijayaprakash123456, 11 months ago

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Answered by deepaktiwari47

Answer:

Na and k 2.F and Cl 3.Mg and Ca

Explanation:

it is because According to Newlands Octaves Law , when elements are arranged on order of increasing atomic masses ,the properties of every eighth element are a repitition of the properties of the first element

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can anyone help to answer this question