[Solved] An element X has mass number 40 and contains 21 neutrons in its atom. To which group of the periodic table does it belong? (b) The element X forms a compound X2Y. Suggest an element that Y might be and give reasons for your choice.

Periodic Classification Of Elements

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08/10/2021 7:47 pm

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Jaiyush19

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(a) An element X has mass number 40 and contains 21 neutrons in its atom. To which group of the periodic table does it belong?

(b) The element X forms a compound X₂Y. Suggest an element that Y might be and give reasons for your choice.

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08/10/2021 7:48 pm

nimit

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(a) Group 1 (2, 8, 8, 1).

(b) Oxygen (X is monovalent so Y has to be divalent to form the compound X₂Y)

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