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Mendeleev's Classification Process

In the classi...

Question

In the classification of the then known elements, Mendeleev was guided by two factors. What are those two factors?

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Solution

In the classification of the then known elements, Mendeleev was guided by two factors, which are:
1. Increasing atomic masses
2.Grouping together of elements having the same properties

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Q. Consider the following statements:
(a) The discovery of inert gases later on did not disturb Mendeleev's arrangement.
(b) In his classification of element, Mendeleev was guided proportional to two factors.
(c) In the present periodic table, periodicity in the properties of elements is related to the periodicity in their electronic configurations.

Which of the above statement(s) is/are correct?

Q. Which of the following element(s) was/were not known when Mendeleev gave his classification?

Which among the following formulae of elements was used by Mendeleev for giving the classification?

Q. (a) State Mendeleev's periodic law.
(b) What chemical properties of elements were used by Mendeleev in creating his periodic table?
(c) State any three limitations of Mendeleev's classification of elements.
(d) Besides gallium, which two other elements have since been discovered for which Mendeleev had left gaps in his periodic table?
(e) Which group of elements was missing from Mendeleev's original periodic table?

Q. Which physical property was used by Mendeleev for classification?

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