french chemist joseph proust said different elements combine together to form compounds.
french chemist joseph proust said different elements combine together to form compounds.
who said different elements combine together to form compounds?
french chemist joseph proust
french chemist joseph proust proposed the law of definite proportions, which states that elements always combine in small, whole number ratios to form compounds, based on several experiments conducted between 1797 and 1804 along with the law of multiple proportions, the law of definite proportions forms the basis of stoichiometry. the law of definite proportions and constant composition do not prove that atoms exist, but they are difficult to explain without assuming that chemical compounds are formed when atoms combine in constant proportions.









































section::::19th century.:jöns jacob berzelius.
history of chemistry
he then proposes relative weights for the atoms of a few elements, without going into further detail.









































the main points of dalton's atomic theory, as it eventually developed, are:









































bullet::::1. elements are made of extremely small particles called atoms.









































bullet::::2. atoms of a given element are identical in size, mass and other properties; atoms of different elements differ in size, mass and other properties.









































bullet::::3. atoms cannot be subdivided, created or destroyed.









































bullet::::4. atoms of different elements combine in simple whole-number ratios to form chemical compounds.









































bullet::::5. in chemical reactions, atoms are combined, separated or rearranged.
john dalton