Two or more elements are chemically combined in a fixed ratio by mass to form a compound.
Compounds are the chemical substances formed when two or more elements combine in a fixed ratio by mass. For example, H2O is a compound, formed when hydrogen (H) and oxygen (O) are combined in a ratio of 1:8 by mass.
Conclusion
Two or more elements are chemically combined in a fixed ratio by mass to form a compound.
The given statement is true.