Modern periodic table was given by .................... (Moseley / Mendeleev).

The most important active step in the development of periodic table was taken by Mendeleev Dalton Avogadro Cavendish.

In modern periodic table,the basic character of oxides

The largest group in Modern periodic table is

What physical and chemical properties of elements were used by Mendeleev in creating his periodic table? List two observations which posed a challenge to Mendeleev’s Periodic Law.

How could the Modern Periodic Table remove various anomalies of Mendeléev’s Periodic Table?

State the law on the basis of which Mendeleev classified the elements. Mention the important features of his periodic table. What are the merits and defects of Mendeleev's periodic table ?

In the modern periodic table, elements are arranged in

State the important salient features of the modern periodic table. State how separation of elements and periodicity of elements forms an important feature of the modern periodic table.

Name the element whose properties can be predicted on the basis of its position in the periodic table given by Mendeleev's.

Which of the following statements (s) about the modern periodic table are incorrect ? (i) The elements in the modern periodic table are arranged on the basis of their decreasing atomic numbers (ii) The elements in the modern periodic table are arranged on the basiss of their increasing atomic mases. (iii) Isotopes are placed in adjoining group(s) in the periodic table (iv) The elements in the modern periodic table are arranged on the basis of their increasing atomic number.