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2016-03-04T01:32:35+05:30

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Sodium. Because atomic size decreases across a period and increases down group.
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sodium bcoz atomic size decreases when going left to right on a period of periodic table.
2016-03-04T04:22:23+05:30

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Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Sodium bcoz atomic size decreases when going left to right on a period of periodic table.
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