First classification of elements based on

Metals and Non metals

Metals, Metalloids and Non metals

Metalloids and Non metals

Metals and Metalloids

Lavoisier is most noted for his discovery of the role oxygen plays in combustion.
He recognized and named oxygen (1778) and hydrogen (1783), and opposed the phlogiston theory.
Lavoisier helped construct the metric system, wrote the first extensive list of elements, and helped to reform chemical nomenclature.

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