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The atomic and ionic radii of alkali met...

The atomic and ionic radii of alkali metals are the smallest in their respective periods.

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The alkali metals

The alkali metals

Ionic radii are

Ionic radii are

Why do ionic radii of alkali metals increase on moving down the group ?

The correct ionic radii order is

The atomic radii of alkaline earth metals are smaller than those of the corresponding alkali metals. Explain, why?

In the periodic table alkali metals are placed in the group:

Ionic radii vary in

Assertion (A): Alkaline earth metals are harder than alkali meatals. Reason (R ): Atomic radii of alkaline earth metas are smaller thant the corresponding alkali metals in the same period.

ICSE-THE s - BLOCK ELEMENTS-TRUE OR FALSE. TYPE QUESTIONS (State whether the following statements are True or False:
  1. Beryllium exhibits diagonal relationship with .................. (magn...

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  2. The electronic configuration of alkali metals is of the type [Noble ga...

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  3. The atomic and ionic radii of alkali metals are the smallest in their ...

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  4. The density of alkali metals increases from Li to Cs.

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  5. 'Each alkali metal is the most electropositive element in its period'....

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  6. The correct order of hydration enthalpies of alkali metal ions is:

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  7. Li is used in photoelectric cells.

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  8. K, Rb and Cs form mainly superoxides.

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  9. Why are lithium halides partially covalent ? Explain with examples.

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  10. Inspite of very high ionisation energy, lithium is the strongest reduc...

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  11. When an alkali metal dissolves in liquid ammonia the solution can acqu...

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  12. The densities of alkaline earth metals are much smaller than those of ...

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  13. Why are the second ionisation energies of alkaline earth metals much s...

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  14. Why do alkaline earth metals and their compounds impart characteristic...

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  15. The flame test with a salt P gave a brick red flame. What is the catio...

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  16. Be(OH)2 is

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  17. BaCl2 is a low melting volatile solid.

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  18. Assertion : Among alkaline earth metals, Be predominantly forms covale...

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  19. Why do lithium and sodium not occur in free state in nature ?

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  20. Lithium forms alloys with a number of metals. Why?

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