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Inorganic Chemistry |
Electronegativity of Alkali Metals |
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(i) These metals are highly electropositive and thereby possess low values of electronegativities. Metallic character and electro positivity increase from Li to Cs (Li < Na < K < Rb < Cs)
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| (ii) Electronegativity of alkali metals decreases down the group as the trend of numerical values of electronegativity given below on Pauling scale suggests. |
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Li |
Na |
K |
Rb |
Cs |
Fr |
| Electronegativity |
0.98 |
0.93 |
0.82 |
0.82 |
0.79 |
- |
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Fr being radioactive elements and thus studies on physical properties of this element are limited.
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Specific heat : It decreases from Li to Cs. |
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Li |
Na |
K |
Rb |
Cs |
Fr |
| Specific heat (Cal/g) |
0.941 |
0.293 |
0.17 |
0.08 |
0.049 |
- |
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