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Sagot :
Answer:
Who first postulated the solid-sphere model of the atom?
The first atomic theory was proposed in 400 BCE by the ancient Greek philosophers Leucippus and Democritus. They proposed that the universe is composed of indivisible particles called atoms that have different sizes, shapes, and even textures. They reasoned that iron atoms were strong with hooks that locked them into a solid, water atoms were smooth and slippery, and salt atoms were sharp and pointy. Due to a number of critics of this model and the lack of sophisticated scientific equipment, atomic theory didn’t develop further for many hundreds of years.
In 1803, a meteorologist named John Dalton published a landmark paper proposing a new atomic theory. His model had four basic assumptions. Dalton proposed that the chemical elements were made up of indivisible particles called atoms. Atoms of one chemical element are unique and different from the atoms of another chemical element. He also proposed that atoms cannot be created nor destroyed during a chemical reaction and that atoms of one element cannot change into atoms of another element. The fourth assumption is that compounds are formed when atoms combine and that product compounds should have the same number and type of atoms as the reactants. John Dalton’s theory and postulates are collectively known as the solid-sphere model.
So the scientist who first postulated the solid-sphere model of the atom is Dalton.
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