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Why group 17 elements are called halogen...

Why group 17 elements are called halogens?

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ICSE-THE PERIODIC TABLE -EXERCISE 5(C)
  1. Give reasons. Alkali and alkaline earth metal compounds usually form...

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  2. Give reasons. Inert gases do not form compounds

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  3. Arrange the following: Elements of group 1, in increasing order of r...

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  4. Arrange the following: Elements of group 17, in decreasing order of ...

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  5. Arrange the following: He, Na, Mg (increasing order of melting point...

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  6. Arrange the following: Chlorine, sodium, magnesium (increasing reduc...

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  7. State the nature of compounds formed when group 17 elements combine wi...

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  8. Why group 17 elements are highly reactive ?

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  9. How many electrons do inert gases have in their valence shells ?

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  10. Name an element of group 18 which can form compounds.

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  11. Name the gas used in : filling balloons

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  12. Name the gas used in : light bulbs

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  13. Name the gas used in : bright coloured advertising light works

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  14. Why group 17 elements are called halogens?

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  15. Comment on the (i) reactivity (ii) colour and (iii) physical state of ...

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  16. Two elements 'P' and 'Q' belong to the same period of the modern perio...

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  17. Tow elelments 'I' and 'Q' belong to the same periiod of the modern per...

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  18. Tow elelments 'I' and 'Q' belong to the same periiod of the modern per...

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  19. Tow elelments 'I' and 'Q' belong to the same periiod of the modern per...

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  20. Tow elelments 'I' and 'Q' belong to the same periiod of the modern per...

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