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Which of the following most likely happens during a chemical change?

a.No new substances are formed.
b.Properties of a substance remain unchanged.
c.Composition of a substance is same as before.
d.Different atoms than before are introduced after the change

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Answer:

D

Explanation:

Take for instance the reaction

2Mg(s) + O2(g) --------->MgO(s)

Initially, the isolated substances were atoms of magnesium and oxygen. A new combination of atoms must be formed in the chemical change known as combustion hence the answer.

Answer:

Different atoms than before are introduced after the change

Explanation:

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