Atoms and Molecules: Foundation and Laws

This flashcard focuses on the formal definition of the atomic mass unit based on the historical standards mentioned in the lecture transcript.

According to the universally accepted standard established in 1961, what is the definition of one atomic mass unit ($u$)?

One atomic mass unit is a mass unit equal to exactly one-twelfth ($\frac{1}{12}$) the mass of one atom of carbon-12.

What's is atom

Atom is small structure than we compare with him

Law of constant proportion

Many compound were compesd of two or more elements and each such compounds had the same elements in the same compound

Who discovered the law of chemical combination

Lavoisret and Joseph prous