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What did William Thomson discover about the atom?

What did William Thomson discover about the atom?

In 1897, the electron was discovered by JJ Thomson. Electrons were negatively charged and scientists had already shown that atoms were neutral.

Why is JJ Thomson important?

J. J. Thomson took science to new heights with his 1897 discovery of the electron – the first subatomic particle. He also found the first evidence that stable elements can exist as isotopes and invented one of the most powerful tools in analytical chemistry – the mass spectrometer.

How did JJ Thomson expand on Dalton’s atomic theory?

Explanation: Thomson’s experiments with cathode ray tubes helped him to discover the electron (which Dalton did not know about). Dalton thought that atoms were indivisible particles, and Thomson’s discovery of the electron proved the existence of subatomic particles.

What did j.j.thomson discover about the atom?

J.J. Thomson is credited with the discovery of the electron, the negatively charged particle in the atom. He is known for the Thomson atomic theory. Many scientists studied the electric discharge of a cathode ray tube.

What was Thomson’s atomic model?

Thomson atomic model, earliest theoretical description of the inner structure of atoms, proposed about 1900 by William Thomson (Lord Kelvin) and strongly supported by Sir Joseph John Thomson, who had discovered (1897) the electron, a negatively charged part of every atom.

How did JJ Thomson determine the charge of an electron?

How did JJ Thomson determine the charge of an electron? In 1897, J.J. Thomson discovered the electron by experimenting with a Crookes, or cathode ray, tube. He demonstrated that cathode rays were negatively charged. . The negative electrons represented the raisins in the pudding and the dough contained the positive charge.

Who was the first person to describe an atom?

Written By: Thomson atomic model, earliest theoretical description of the inner structure of atoms, proposed about 1900 by William Thomson (Lord Kelvin) and strongly supported by Sir Joseph John Thomson, who had discovered (1897) the electron, a negatively charged part of every atom.