ATOMIC RADIUS

PERIODIC TABLE TREND


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Atomic Size: the TrendPeriod 3: left → rightgetting smaller ←Na186 pmMg160 pmAl143 pmSi117 pmP110 pmS104 pmCl99 pm Group 1: top → bottomgetting bigger →Li152 pmNa186 pmK227 pmRb248 pmCs265 pm Period →smaller radiusGroup ↓larger radiusCslargest in group 1
1. Across a Period (left → right)Protons barhte, shells sameNucleus pulls harder → radius smaller
2. Down a Group (top → bottom)A new shell at every stepSo the radius is bigger
3. RememberPeriod → smallerGroup ↓ bigger
MATRIC CHEMISTRY · PERIODIC TABLE · PUNJAB BOARDS
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