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State Mendeleev's periodic law....

State Mendeleev's periodic law.

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When the elements are arranged in the order of their increasing atomic masses, Mendeleev found that the elements with similar physcial and chemical properties repeat after a definite interval. On the basis of these finding Mendeleev statred the periodic law.
The physcial and chemical properties of elements are a periodic function of their atomic masses.
On the basis of this research, elements were arranged in the order of their increasing atomic numbers in a more systematic way. Accordingly the statement of the modern periodic law was stated.
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State Modern Periodic Law ? Why is it considered better than Mendeleev's periodic law for the classification of the elements ?

(a) What was the basis of Mendeleev's Classification of elements ? (b) List two achievements of Mendeleev's periodic tables. (c) List any two observations which posed a challenge to Mendeleev's periodic law.

Which of the following states that properties of elements are a periodic function of their atomic number''? A) Dobereiner's triads B) Modern periodic law C) Newlands's law of octaves D) Mendeleev's periodic law

In what respect does modern statement of the periodic law differ from stated in Mendeleev's periodic law ?