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The table shows information about particles X and Y.
Particles Number of protons Number of neutrons Electronic configuration
X 9 10 2,8
Y 17 20 2,8,8
Which statement is correct for both X and Y?
I) They are atoms of metals
II) They are atoms of noble gases.
III) They are isotopes of the same element
IV) They are negative ions.

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Only IV

II and III

I, II and III

II and IV

answer is C.

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Detailed Solution

Atomic number of X is 9 and Y is 17 and they are F, Cl respectively.

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