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Which is true about periods and groups?
O Groups are horizontal and their number tells us the number of energy levels in an atom of that
element. Periods are vertical and contain elements with similar properties.
Periods are horizontal and their number tells us the number of energy levels in an atom of that
element. Groups are vertical and contain elements with similar properties.
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Answers: 2
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Which is true about periods and groups?
O Groups are horizontal and their number tells us the numbe...
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