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An element of p-block in which last elec...

An element of p-block in which last electron enters into s-orbital of valence shell insteatd of p-orbital is :

A

As

B

Ga

C

No such element in there

D

Helium

Text Solution

Verified by Experts

The correct Answer is:
D
He is a p-block members with configuration `1s^(2)`.
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DINESH PUBLICATION-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES-All Questions
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  2. Which among the following is not iso-electronic ?

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  4. In which of the following compound size of cation to anion ratio is mi...

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  5. Which of the following ios not different for an atoms and its correspo...

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  6. Which of the following elements represents highly electropositive as w...

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  7. In going from fluorine to iodine

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  8. The trend common to both the group 2 and 16 elements in the periodic t...

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  9. The element of second period which forms most acidic oxide is

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  10. For an element with configuration 5s^(2)4d^(10)5p^(3) the chemistry is...

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  11. The element with electronic configuration 1s^(2)2s^(2)2p^(6)3s^(2) is

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  12. Which of the following is energy releasing process ?

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  13. Which of the following oxide is amphoteric ?

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  14. Which set of elements have strongest tendency to form anions ?

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  15. In periodic table, melting point/boiling point increases down the grou...

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  16. Which of the following elements has zero electron affinity ?

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  17. Which of the following elements is expected to have highest electron a...

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  18. Which of the following in an energy consuming process ?

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  19. The electron affinity of Be is almost similar to that of

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  20. The correct order of electron affinity of halogens

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