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An element Q belongs to 3^(rd) period an...

An element Q belongs to `3^(rd)` period and group 17 of the Modern Periodic table. Answer the following questions:
What is the valency of Q.
What is the name of the element?
Write the formula of the compound formed in the reaction of Q with sodium.

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Chlorine NaCl
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OSWAL PUBLICATION-DIKSHA QUESTIONS -PERIODIC CLASSIFICATION OF ELEMENTS (SHORT ANSWER)
  1. Two elements 'A' and 'B' have atomic numbers 11 and 19 respectively. S...

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  2. An element Q belongs to 3^(rd) period and group 17 of the Modern Perio...

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  3. The atomic number of an element is 16. Predict the number of valence e...

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  4. The atomic number of an element is 16. Predict its valency

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  5. The atomic number of an element is 16. Predict its group number

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  6. The atomic number of an element is 16. Predict whether it is a metal o...

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  7. The atomic number of an element is 16. Predict the nature of oxide for...

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  8. The atomic number of an element is 16. Predict the formula of its chlo...

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  9. F, Cl and Br are elements each having seven valence electrons. Which o...

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  10. In the modern periodic table, the element calcium (atomic number = 20)...

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  11. How does the metallic character of elements change on going from left ...

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  12. Can the following groups of elements be classified as Dobereiner's tri...

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  13. An atom has electronic configuration 2, 8, 7. (a) What is the atomic n...

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  14. The electronic configuration of an element is 2, 8, 4. State its, (a...

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  15. How it can be proved that the basic structure of the Modern Periodic T...

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  16. Name the element which has one shell only which is completely filled w...

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  17. Nitrogen (atomic number 7) and phosphorus (atomic number 15) belong to...

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  18. Give reasons - K atom is bigger than Na atom even though both these ...

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  19. An element X belongs to group 17 and third period of the periodic tabl...

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  20. An element X belongs to group 17 and third period of the periodic tabl...

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