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The inner shells of electrons are comple...

The inner shells of electrons are completely filled in

A

Li

B

Na

C

K

D

Both (1) and (2)

Text Solution

Verified by Experts

The correct Answer is:
D
`Li` is `1s^(2)2s^(1)` while Na is `1s^(2)2s^(2)2p^(6)3s^(1)`.
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R SHARMA-THE S BLOCK ELEMENTS-Question Bank (Level- II)
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  2. Which of the following compounds contains potassium ?

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  6. Alkali metals liberate H(2) gas when they react with

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  7. Which of the following alkali-metal hydroxides is the least soluble in...

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  8. Which of the following compounds is the most stable?

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  9. The alkali metal cation having the least ionic mobility is

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  10. Which of the following is insoluble in organic solvents?

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  11. NaNO(3) when heated to 500^(@)C given

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  12. Which of the following decomposes more readily than the other forming ...

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  13. Which of the following compounds does not contain calcium?

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  14. Which of the following has the highest melting and boiling points?

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  15. Which of the following alkaline earth metals do not impart any color t...

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  16. Which one among the following is the most basic?

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  17. Which of the following compounds is covalent?

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  19. Which of the following is incorrect for both Be and Al?

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