Question

law of multiple proportion will not hold good if compounds have different (blank space) of elements
fill in the blank space
1)isotopes
2)isobars
3)isomers
4)isosteres
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Answer 1

The law does not hold true if the different isotopes of the element are involved in making chemical compound, since the masses of each isotope differ

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Answer 2

Answer:

1)isotopes is the answer of question