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- Which of the following statements is not correct about Lother Meyer’s curve?Option: 1 The alkali metals occupy maxima of the curve<br
- #Classification of Elements and Periodic table
- #Joint Entrance Examination Main
- #National Eligilibility Cum Entrance Test
- #Engineering
- #Chemistry
Which of the following statements is not correct about Lother Meyer’s curve?
The alkali metals occupy maxima of the curve
The transitions metals occupy the minima of the curve
The halogens occupy positions on the descending portions of the curve
The alkali earth metals occupy mid positions on the descending portions of the curve
Answers (1)
Mendeleev’s Periodic table -
Lother Meyer:
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He plotted a curve between atomic weight and atomic volume of different elements.
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The following observations can be made from the curve –
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Most electropositive elements i.e. alkali metals (Li, Na, K, Rb, Cs etc.) occupy the peak positions on the curve.
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Less electropositive i.e. alkali earth metal (Be, Mg, Ca, Sr, Ba) occupy the descending position on the curve.
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Metalloids (B, Si, As, Te, At etc.) and transition metals occupy bottom part of the curve.
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Most electronegative i.e. halogens (F, Cl, Br, I) occupy the ascending position on the curve.
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Note : Elements having similar properties occupy similar position on the curve.
Conclusion : On the basis of this curve Lother Meyer proposed that the physical properties of the elements are periodic functions of their atomic wt. and this becomes the base of Mendeleef's periodic table.
The Lother Meyer curve is shown above:
Thus, halogens occupy positions on the ascending portions of the curve.
Therefore, Option(3) is correct
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