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Chemistry, 28.08.2019 15:30 jonquil201

The two elements a and b have same no of electrons in the penultimate and ante penultimate shells. if a and b form stable ions by the loss of 1 and 2 electrons from their fourth shell then find the atomic no of a and b?

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The two elements a and b have same no of electrons in the penultimate and ante penultimate shells. i...
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