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What is the cause of periodicity in prop...

What is the cause of periodicity in properties of elements ?

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The cause of periodicity in properties of elements is the repetition of similar electronic configuration of atoms in their valence shell. It occurs after regular intervals.
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OMEGA PUBLICATION-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES-Multiple Choice Questions (MCQs)
  1. What is the cause of periodicity in properties of elements ?

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  2. Mendeleev's periodic law is based on

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  3. In the modern periodic table elements are arranged in order of

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  4. The modern periodic table known as the long form of periodic table was...

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  5. The long form of periodic table has

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  6. Fill in the blanks: The elements of group 17 are called…........

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  7. Alkaline earth metals belong to

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  8. Which of the following represents the electronic configuration of d-bl...

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  9. Explain why transition elements have high melting and boiling points ?

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  10. Which among the following will have largest size ?

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  11. Which of the following is/are correct?

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  12. The energy required to remove an electron from a gaseous atom from its...

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  13. In a period from Li to F ionisation enthalpy

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  14. Given the correct order of electronegativity of central atom in follow...

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  15. The electronegativities of F and H are 4.0 and 2.1 respectively. The p...

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  16. Which of the following element has maximum electron gain enthapy(neg...

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  17. The main source of energy is ….. .

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  18. The 3rd period of the periodic table contains

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  19. Which of the elements show least values of ionisation energies within ...

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  20. r("van der Waal") is

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  21. Which of the following does not have any unit?

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