Trying to find the right answer to this..

Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.

Classification of Elements and Periodicity in Properties

Short Answer Type

61.

What is periodic table? What do you mean by classification of elements?

176 Views

62.

What was the need for the classification of elements?

167 Views

Long Answer Type

63.

Discuss the earlier attempts to classify elements.

227 Views

Short Answer Type

64.

Which important property did Mendeleev use to classify the elements in his Periodic Table? and did he stick to that?

285 Views

65.

What is the basis of Mendeleev's Periodic table?

352 Views

Long Answer Type

66.

Give a brief discussion of the Mendeleev's Periodic table.

287 Views

Short Answer Type

67.

What are the merits and applications of Mendeleev's Periodic table?

183 Views

Long Answer Type

68. What are the defects or drawbacks of Mendeleev’s table?

1861 Views

Short Answer Type

69.
State and explain Modern Periodic Law.

In 1913, Moseley stated that the physical and chemical properties of the elements are determined by their atomic numbers instead of their atomic masses. The acceptance of atomic number as the fundamental property of an element led to the development of modern periodic law. It states that “Physical and chemical properties of the elements are a periodic function of their atomic numbers.” It means that if the elements are arranged in order of their increasing atomic numbers, the elements with similar properties recur after certain regular intervals.

137 Views