Science, asked by ningshiwatiimchen13, 1 month ago

define mendeleev's periodic table? what are the achievement of Mendeleev? write it's demerits​

Answers

Answered by aliyasumiyatahir
0

Answer:

The properties of this element are periodic functions of their atomic mass

Answered by Merci93
3

\sf\underline{Mendeleev's~Periodic~law :}

The properties of the elements are the periodic functions of their atomic weights.

  • His periodic table had 8 groups and 7 periods

\sf\underline{Achievements :}

  • Division of elements into groups and periods (systematic division)
  • Correction of few atomic weights
  • Predicting the properties of missing elements like scandium and gallium

\sf\underline{Limitations:}

  • Anomalous pairs of elements - Mendeleev placed elements with higher atomic weights before lower ones, Ex : Te and I
  • Dissimilar elements placed together - Elements with dissimilar properties were placed in same groups like IA and IIA have small resemblance

Have a good night!

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