Question

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Select the best answer.

This man proposed that all matter was made up of atoms.

Amedeo Avogadro

Dmitri Mendeleev

John Dalton

Robert Boyle

Answer 1

Answer:John Dalton

Step-by-step explanation:

He proposed the atomic theory in 1802 which states that

1.) All elements are made up of small,indivisible particles called atoms.

2.) Atoms can neither be created nor destroyed

3.) Atoms of the same element are alike in every aspect and differ from atoms of all other elements

4.)When atoms combine with other atoms they do so in simple ratios

5.) All chemical changes result from the combination or the separation of atoms.

Answer 2

John Dalton

Step-by-step explanation:

Dalton's atomic theory was the foundation for a new understanding of chemical structures. He proposed that matter was constituted by indivisible and indestructible particles "atoms." He theorized that all atoms of a particular substance were equal, and the atoms of different substances had atoms of different sizes and masses.

He also proposed that all compounds of elements were combinations of elements but in a very precise ratio.