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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 less in number than metallic elements.

C

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

D

For transition elements the ionisation energies increase gradually with increase in atomic number.

Text Solution

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The correct Answer is:
D
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CENGAGE CHEMISTRY ENGLISH-PERIODIC CLASSIFICATION OF ELEMENTS AND GENERAL INORGANIC CHEMISTRY-Exercises (Singlecorrect) General Electronic Configuration And Periodicity
  1. The statement that is false for the long form of the periodic table is...

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  2. In the periodic table, going down in fluorine group

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  3. In the long form of periodic table,the non-metals are placed in

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  4. Alkali metals in each period have

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  5. Which one pair of atoms or ions will have same configuration ?

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  6. In the modern periodic table, the period indicates the value of

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  7. Which of the following does not reflect periodicity of elements ?

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  8. What is the number of elements in the 3^(rd) period of the modern peri...

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  9. Which of the following set have almost similar atomic radii ?

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  10. Which of the following belongs to the category of transition metal?

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  11. Without looking at the periodic table, select the elements belonging t...

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  12. The elements of same group of the periodic table have

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  13. The elements which are characterised by the outer shell configuration ...

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  14. General electronic configuration of transition metals is

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  15. An element with atomic number 20 will be placed in which period of the...

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

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  17. In the modern periodic table, elements are arranged in

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  18. Name of the heaviest naturally occurring element.

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  19. The screening effect of d-electron is

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  20. Which of the following represents the electronic configuration of the ...

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