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Which of the following statements is not correct about Lother Meyer’s curve?

Option: 1

The alkali metals occupy the maxima of the curve.


Option: 2

The alkaline earth metals are at the mid positions on the descending portions of the curve.


Option: 3

The halogens are at mid positions on the descending portions of the curve.


Option: 4

The transition metals occupy the minima of the curve.


Answers (1)

best_answer

 

Lother Meyer: 
  1. He plotted a curve between atomic weight and atomic volume of different elements.

  2. The following observations can be made from the curve –

    1. Most electropositive elements i.e. alkali metals (Li, Na, K, Rb, Cs, etc.) occupy the peak positions on the curve.

    2. Less electropositive i.e. alkali earth metals (Be, Mg, Ca, Sr, Ba) occupy the descending position on the curve.

    3. Metalloids (B, Si, As, Te, At, etc.) and transition metals occupy the bottom part of the curve.

    4. Most electronegative i.e. halogens (F, Cl, Br, I) occupy the ascending position on the curve.

Note: Elements having similar properties occupy a similar position on the curve.

Conclusion: Based on 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 Mendeleev's periodic table.-

The Lother Meyer curve is given below:

In this curve, it is easily observable that the halogens occupy the mid positions of the ascending portions of the curve.

Therefore, Option(3) is correct

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Rishabh

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