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An atom of an elemen t has electronic st...

An atom of an elemen t has electronic structure 2,8,a which statement is correct for it?

A

It has a valency of 7.

B

It exists as diatomic molecule

C

The element is of a non metallic nature.

D

It froms a basic oxide

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The correct Answer is:
D
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NARAYNA-S-BLOCK ELEMENTS-Level - I(ALKALI METALS)
  1. A colourless salt gives violet colour to Bunsen flame and also turns m...

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  2. Alkali metals are soft ans have relatively low m.pt. and low density. ...

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  3. An atom of an elemen t has electronic structure 2,8,a which statement ...

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  4. Which property increase in magnitude as the atomic number of alikali i...

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  5. Sodium ……. As compared to pstassium

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  6. Which substance gives a different flame coloration from the other?

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  7. Sodium has as compared potassium

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  8. Alkali metals are good reducing agents because

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  9. Which alkali methal is most meallic in character?

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  10. When sodium is heated in flame it gives

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  11. Which one of the following represents the electronic configuration of ...

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  12. A substance X is a compound of an element of group 1 A the substance X...

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  13. Which of the following is correct for CsBr(3)?

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  14. Which is the corret order of solubility in water?

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  15. Which one of the following represent a correct sequence of reducing po...

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  16. The most basic oxide among the following is

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  17. Which is more basic in character?

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  18. Sodium burns in dry air to give

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  19. Which of the following compounds on reaction with Na(2)O(2) gives yell...

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  20. Potassium when heated strongly in oxygen, if forms :

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