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| Nurtured by two enterprising graduates of the Department of Chemical Engineering & Bio-Chemical Engineering, IIT Delhi, GRAVITY CLASSES came into existence in January 2007.
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Inorganic Chemistry |
| Atomic and ionic radii |
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(i) The alkali metals have largest atomic and ionic radii than their successive elements of other groups belonging to same period.
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| (ii) The atomic and ionic radii of alkali metals, however, increases down the group due to progressive addition of new energy shells. |
| No doubt the nuclear charge also increases on moving down the group but the influence of addition of energy shell predominates |
| Li Na K Rb Cs Fr |
| Atomic radius (pm) 152 186 227 248 265 375 |
| Ionic radius of M+ 60 95 133 148 169 – |
| ions (pm) |
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