GENCHEM: DALTON'S ATOMIC THEORY

john dalton

he is an englis chemist that put together the modern atomic theory which built up the works of joseph proust, antoine lavoisier and others

1807

in what year did john dalton put up the modern atomic theory?

joseph proust and antoine lavoisier

can you name two of the many scientists that benefitted from the mdoern atomic theory?

law of conservation mass

the 5th postulate (atoms are rearranged, not destroyed or created) was based on this.

law of conservation mass

this states that in a clsoed system, matter is neither created or destroyed. this means that the mass of the starting components of a reaction is equal to the mass of the products of the reaction

joseph proust

he is a french chemist that formulated the law of definite proportions or the law of constant composition

law of constant composition or definite proportions

this law states that elements combine in fixed proportions by mass to form compounds.

law of constant composition

this is the basis of the fourth postulate of dalton (the compound is a combination of the atoms of two or more elements in fixed ratios)

law of multiple proportions

before publishing the atomic theory, dalton proposed this law that states when two elements form two or more compounds, the masses of the same two elements will be ratios of small whole numbers

law of multiple proportions

this lawl only holds for compounds consisting of the same elements.

true

the law of multiple proportions cannot be applied to NO2 and CO2. this is bc they dont have the same elements.

TRUE

in dalton’s atomic theory postulates, it says that matter is made up of tiny, invisible particles called atoms. true or false>?

false, identical.

All atoms of given element have different mass

false, differ.

Atoms of one element are the same. in properties from atoms of other elements.

compound

in dalton’s atomic model theory, it says that this is is a combination of the atoms of two or more elements in fixed ratios.

false, rearranged.

During a chemical reaction, the atoms are unmoving; they are not destroyed or created.