Question

9.Compounds are formed when
1 point
The ratio of masses of combining atoms is fixed
By a chemical change
When a substance contains identical molecules
All the above​​​

Answer 1

Explanation:

compounds are formed when the ratio of masses of combination atoms is fixed ratio of atoms held together in a defined spatial arrangement by chemical bonds chemical compounds can be molecular compounds held together by eovalent bonds salts held together by ionic bonds.

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