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If the number of protons in one atom of ...

If the number of protons in one atom of an element `Y` is `20`, then the number of electrons in its ion `Y^(2+)` will be :

A

`20`

B

`19`

C

`18`

D

16

Text Solution

Verified by Experts

The correct Answer is:
C
c
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LAKHMIR SINGH & MANJIT KAUR-METALS AND NON-METALS-Exercise
  1. The rechargeable battery used in a mobile phone hand set is usually :

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  2. The number of protons in one atom of an element X is 8. What will be t...

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  3. If the number of protons in one atom of an element Y is 20, then the n...

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  4. The noble gas having only two electrons in its valence shell is:

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  5. A covalent molecule having a double bond between its atoms is:

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  6. The molecules having triple bond in them are:

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  7. One of the following contains a double bond as well as single bonds. T...

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  8. Which of the following has a triple bond as well as single bonds?

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  9. Two non-metals combine with each other by the sharing of electrons to ...

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  10. A metal combines with a non-metal by the transfer of electrons to form...

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  11. The electronic configuration of three elements X,Y and Z are as follow...

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  12. An element A has 4 valence electrons in its atom whereas element B has...

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  13. In the formation of a compound XY(2) atom X gives one electron to each...

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  14. An element 'A' has two electrons in the outermost shell of its atom an...

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  15. The electronic configurations of two elements A and B are given below:...

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  16. Four elements A, B, C and D have the following electron arrangement in...

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  17. An element X oif atomic number 12 combines with an element Y of atomic...

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  18. The electronic configurations of three elements A, B, and C are as fol...

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  19. the electronic configurations of four particles A,B,C and D are given ...

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  20. The atomic number of an element X is 12. (a). What must an atom of X...

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