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Q: Name the British chemist who presented his atomic theory in 1808, on conservation of mass and law of definite proportions, which was a turning point in the study of matter.
  • A. Proust
  • B. Lavoisier
  • C. Ernest Rutherford
  • D. John Dalton
Correct Answer: Option D - John Dalton's presented his Atomic Theory in 1808, on conservation which was a turning point in the study of matter. John Dalton proposed that all matter was composed of atoms, indivisible and indestructible building blocks. While all atoms of an element were identical different elements had atoms of different size and mass.
D. John Dalton's presented his Atomic Theory in 1808, on conservation which was a turning point in the study of matter. John Dalton proposed that all matter was composed of atoms, indivisible and indestructible building blocks. While all atoms of an element were identical different elements had atoms of different size and mass.

Explanations:

John Dalton's presented his Atomic Theory in 1808, on conservation which was a turning point in the study of matter. John Dalton proposed that all matter was composed of atoms, indivisible and indestructible building blocks. While all atoms of an element were identical different elements had atoms of different size and mass.