The 'plum pudding' model of the atom was proposed by JJ Thomson, who had also discovered the electron. The 'plum pudding' model of the atom was proposed by JJ Thomson, who had also discovered the ...

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Atoms are made up of a nucleus, protons and electrons. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Atoms are the basic units of matter.

Part of Physics (Single Science) Unit 1: Atomic and nuclear physics Most of the mass and all of the positive charge of an atom is in the nucleus. Most of an atom is empty space, (a vacuum). In 1897, ...

On a chilly evening in 1897, in the quiet halls of the Cavendish Laboratory in Cambridge, a young physicist leaned over a glowing glass tube, watching streams of mysterious rays curve under the ...

For millennia, atoms had been phantoms, widely suspected to exist but remaining stubbornly invisible — though not indivisible, as their name (Greek for “uncuttable”) originally implied. By the start ...

Everyone now knows the basic atomic structure that Rutherford discovered "We're celebrating something really important. We're celebrating nothing less than the birth of modern physics." As eulogies go ...

John L. Heilbron describes the route that led Niels Bohr to quantize electron orbits a century ago. You have full access to this article via your institution ...