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The statement that is not correct for pe...

The statement that is not correct for periodic classification of elements is

A

The properties of elements are the periodic functions of their atomic numbers.

B

Non-metallic elements are lesser in number than metallic elements.

C

The first ionixation energies of elements along a period do not vary in a regular manner with increase in atomic number.

D

For transition elements the d-subshells are filled with electrons monotonically with increase in atomic number.

Text Solution

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The correct Answer is:
D
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ALLEN-QUANTUM NUMBER & PERIODIC TABLE-J-ADVANCED EXERCISE
  1. The correct order of ionic size of N^(3-), Na^(+) , F^(-) ,Mg^(2+) and...

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  2. The basic character of the oxides, MgO,SrO,K(2)O,NiO,Cs(2)O increases ...

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  3. The statement that is not correct for periodic classification of eleme...

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  4. Ca^(2+) has a smaller ionic radius than K^(+) because it has ............

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  5. The basic nature of hydroxides of group 13 (III-A) decreases progressi...

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  6. Moving from right to left in a periodic table, the atomic size is :

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  7. The increasing order of electronegativity in the following elements :

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  8. One element has atomic weight 39. Its electronic configuration is 1s^(...

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  9. The number of paired electrons in oxygen atom is :

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  10. The decreasing size of K^(+),Ca^(2+),Cl^(-) & S^(2-) follows the order...

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  11. The incorrect statement Among the following is A)The first ionisation...

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  12. Li^(+),Mg^(2+),K^(+),Al^(3+) (Arrange in increasing order of radii)

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  13. Which one of the following statement (s) is (are) correct?

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  14. The ground state electronic configuration of nitrogen atom can be repr...

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  15. The electronic configuration of an element is 1s^(2)2s^(2)2p^(6)3s^(2)...

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  16. Assertion: F atom has less negative electron gain enthaply than Cl ato...

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  17. The correct order of radii is

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  18. The IE of Be is greater than that of B.

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  19. The set representing correct order of IP(1) is

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  20. The least stable ion among the following is

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