How can the same elements form different compounds?

1 Answer
anor277
Mar 4, 2017

By combining together in different proportions.

Explanation:

Organic chemistry provides a rich and varied demonstration of this principle. Take carbon, and hydrogen, 2 single elements. An entire alkane series is available: C_nH_(2n+2), from methane to tars, that is huge and widely studied.

Take the olefin series, C_nH_(2n), different proportions allows a different family of compounds, and many members in the family.

And we could move to inorganic chemistry. There is OH_2, which we would call what? And also "hydrogen peroxide", H_2O_2. And we could even invoke the formal cation, H_3O^+. What are the proportions in each example?

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