Table of Contents
Who said atoms unbreakable?
In the 5th century B.C. a philosopher named Democritus hypothesized that all matter (plus space and time) is composed of tiny indestructible units, called atoms.
What did Aristotle believe about the atom?
In Aristotle’s time, atomists held that matter was fundamentally constructed out of atoms. These atoms were indivisible and uniform, of various sizes and shapes, and capable only of change in respect of position and motion, but not intrinsic qualities.
Who said atoms are neither created nor destroyed?
John Dalton
“Atoms can neither be created nor destroyed.” This principle was given by __? The given principle is one of the postulates of the Dalton’s atomic theory given in 1803 by John Dalton. The postulates of Dalton’s atomic theory are as follows: 1.
Who said atoms are not divisible?
Atomic theories. The Greek philosopher Democritus (460-370BC) was the first person to propose the idea that matter was not infinitely divisible.
What did Democritus say about the atom?
Democritus believed that atoms were uniform, solid, hard, incompressible, and indestructible and that they moved in infinite numbers through empty space until stopped. Differences in atomic shape and size determined the various properties of matter.
What did Democritus say about atoms?
What did Aristotle and Democritus say about atoms?
He theorized that all material bodies are made up of indivisibly small “atoms.” Aristotle famously rejected atomism in On Generation and Corruption. Aristotle refused to believe that the whole of reality is reducible to a system of atoms, as Democritus said. As it turned out, though, Democritus was right.
What particle did JJ Thomson discover?
electrons
Thomson announces the discovery of electrons. On April 30, 1897, British physicist J.J. Thomson announced his discovery that atoms were made up of smaller components. This finding revolutionized the way scientists thought about the atom and had major ramifications for the field of physics.
Who discovered that atoms are mostly empty space?
Rutherford
Rutherford carried out a fairly simple calculation to find the size of the nucleus, and found it to be only about 1/100,000 the size of the atom. The atom was mostly empty space.