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Question

The diagrams given below show the electron arrangement in the outer shells of five elements 1 to 5 All elements are from period 3 of the periodic table Which two elements will form a compound with the YZ3 type formula ?
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A
3 and 2
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B
5 and 2
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C
3 and 5
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D
Both A and B
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Solution

The correct option is A 3 and 2
YZ3 Y+3+Z
So Y have 3 valence electron while Z have 7 valence electron.
so here, these two elements are 3 and 2.

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