A science teacher placed a magnesium wire in flame. the wire turned white where the flame touched it. which statement best explains the chemical change A. a new substance formed

D. the magnesium wire changed shape

the subject is science

A

Explanation:

The correct answer would be that a new substance is formed.

When magnesium wire is burnt in the presence of oxygen, the wire reacts with oxygen and a new substance known as magnesium oxide is formed. The new substance is usually white in color and the equation of the reaction is as below:

(white)

Hence, the correct option is A.

the positions which points up in upward carbon and down in downward carbon are axial

and vice versa holds true for equatorial positions

so the correct answer with labelled diagram will be