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Why are group I elements called alkali m...

Why are group I elements called alkali metals and group 17 are called halogens ?

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Group I elements are called alkali metals because their hydroxides form soluble bases called alkalies and their ashes are alkaline in nature. Group 17 are called halogens because they are salt-producer.
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SUBHASH PUBLICATION-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES -TWO marks questions and answers
  1. On the basis of their electronic configurations, explain why alkali m...

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  2. Give the order in which the melting points of halides of sodium decrea...

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  3. Why are group I elements called alkali metals and group 17 are called ...

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  4. Give four characteristics of d-block elements.

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  5. Give any two features of Mendeleev's periodic table.

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  6. How does the solubility of a solute vary with increase in temperature ...

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  7. Why is melting point of LiCl lower than NaCl ?

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  8. Arrange the following in increasing order : BeCO(3),BaCO(3),CaCO(3),...

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  9. Arrange the following in increasing order : BeCl(2),BaCl(2),SrCl(2),...

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  10. Which alkali metal carbonate is thermally unstable and why ?

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  11. Out of O and S which has higher negative electron gain enthalpy and wh...

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  12. Predict which atom in each of the following Period has the highest fir...

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  13. Among the elements Li, K,Ca, S and Kr , which one is expected to have ...

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  14. Among the elements of the third period Na to Ar pick out the element: ...

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  15. Among the elements of the third period Na to Ar pick out the element: ...

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  16. Among the elements of the third period Na to Ar pick out the element: ...

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  17. Among the elements of the third period Na to Ar pick out the element: ...

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  18. Name a species that will be isoelectronic with each of the following a...

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  19. Name a species that will be isoelectronic with each of the following a...

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  20. Name a species that will be isoelectronic with each of the following a...

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