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The atomic number of an element X is 19....

The atomic number of an element `X` is `19`. The number of electrons in its ion `X^(+)` will be

A

`18`

B

`19`

C

`20`

D

`21`

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The correct Answer is:
A
a
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LAKHMIR SINGH & MANJIT KAUR-METALS AND NON-METALS-Exercise
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  3. The atomic number of an element X is 19. The number of electrons in it...

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  4. The atomic number of an element Y is 17. The number of electrons in it...

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  5. The atomic numbers of four elements, A, B, C and D are 6, 8, 10 and 12...

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  6. The atomic numbers of four elements P, Q, R and S are 6, 10, 12 and 17...

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  7. The solution of one of the following compounds will not conduct electr...

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  9. Which one of the following properties is not generally exhibited by io...

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  11. The atomic number of an element X is 16. The symbol of ion formed by a...

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  12. The number of protons in the nucleus of one atom of an element Y is 5....

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  14. Element X reacts with element Y to form a compound Z, during the forma...

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  15. One of the following compounds is not ionic in nature. This compound i...

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  16. The rechargeable battery used in a mobile phone hand set is usually :

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

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

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

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

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