Chemistry
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Across a period the valence electrons increase by _________ while down a subgroup they _________.
Related Questions
The element from the elements Li, Na, K which has maximum metallic character.
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Periods are _________ horizontal rows of elements in the periodic table and an element with three electron shells and two electrons in it's valence shell belongs to period _________ and group _________.
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Across a period, the electropositive character _________ and down a group the electronegative character _________.
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Elements at the extreme left of the modern periodic table are _________ reactive, while elements on the extreme right [group 18 (0)] are _________reactive.