Question

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Answer 1

Answer:

i) magnesium

ii) XY2 and XY

Explanation:

hope this helps you

Answer 2

Explanation:

1} The element X is magnesium as its atomic no. is 12 (2+8+2)

2} COmpound Y= Mg+Cl2------> MgCl2

   Compound Z= 2Mg+O2---------> 2MgO