Question

Arrange the following elements in the order of their decreasing metallic character

Na, Si, Cl, Mg, Al

a. Cl > Si > Al > Mg > Na

b. Na > Mg > Al > Si > Cl

c. Na > Al > Mg > Cl > Si

d. Al > Na > Si > Ca > Mg

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Answer 1

Explanation:

Metallic characteristic decreases across a period on moving right. Therefore, the order comes out to be Na > Mg > Al > Si > Cl.

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Answer 2

Answer:

Burning magnesium ribbon in air to form magnesium oxide is an example of combination reaction. ... Oxygen and magnesium combine in a chemical reaction to form this compound. After it burns, it forms a white powder of the magnesium oxide. Magnesium gives up two electrons to oxygen atoms to form this powdery product.