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What is the basic difference between a group and a period in terms of electronic configuration ? |
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Answer» In a group, though the number of shells increases as we move downward, but the number of electrons in the outermost shell remains the same. In a period, as we move from left to right, the outermost shell or valence shell gets progressively filled from group 1 to group 18 and the shell does not change. |
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