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Which one of the following is a correct ...

Which one of the following is a correct electronic configuration of sodium ?

A

`2.8`

B

`8.2.1`

C

`2.1.8`

D

`2.8.1`

Text Solution

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The correct Answer is:
D
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CPC CAMBRIDGE PUBLICATION-STRUCTURE OF THE ATOM -EXERCISE
  1. Compare the properties of electrons, protons and neutrons.

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  2. What is the limitation of Thomson's model of atom.

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  3. What are the limitations of Rutherford's model?

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  4. Summarize the Bohr's Model of an atom.

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  5. Compare all the proposed model of an atom given in this chapter.

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  6. Summarize the rule for writing of distribution of electrons in various...

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  7. Define valency by taking examples of silicon and oxygen .

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  8. Explain with examples (a) Atomic number Mass number Isotopes

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  9. Na^(+) has completely filled K and L shells explain ?

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  10. If Bromine atom is available in the form of say, two isotopes .(35)^(7...

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  11. The average atomic mass of a sample of an element X is 16.2 u. What ar...

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  12. If Z = 3, what would be the valency of the element ? Also, name the el...

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  13. Composition of the nuclei of two atomic species X and Y are given as u...

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  14. For the following statements, write True (T) or False (F). If the stat...

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  15. Rutherford's alpha - particle scattering experiment was responsible fo...

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  16. Isotopes of an element have

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  17. Number of valence electrons in ion are

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  18. Which one of the following is a correct electronic configuration of so...

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  19. Complete the following table

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