Atoms & Elements Timeline 7 - 1 by Nathan Hakak

Neils Bohr

nhakak29_1_1 — 2024-02-09 16:08:09 UTC

In 1913 what Neils Bohr discovered was that if the electron gains energy, it will be able to jump to a level farther away from the nucleus. If the electron loses energy, it will fall to a closer level to the nucleus.

Ernest Rutherford

nhakak29_1_1 — 2024-02-09 16:23:31 UTC

In 1911 Ernest Rutherford discovered that most of the atom is empty space surrounding a tiny nucleus. he showed this by shooting a beam of alpha particles which was aimed at a piece of gold foil. Most alpha particles passed through the foil, but a few were scattered backward.

James Chadwick

nhakak29_1_1 — 2024-02-12 16:49:31 UTC

In 1932 James Chadwick discovered that there were neutrons in the atom.

Erwin Schrodinger

nhakak29_1_1 — 2024-02-12 16:53:27 UTC

In 1926 Erwin Schrodinger discovered that electrons don't move in a certain line and that it is sort of a wavy line where electrons may speed up or slow down, it was called the atomic cloud.

John Dalton

nhakak29_1_1 — 2024-02-12 16:59:26 UTC

In 1766-1844 he discovered that all atoms of the same element are very alike.

Ancient Greece/India

nhakak29_1_1 — 2024-02-12 17:02:29 UTC

In 600 B.C. the idea of the atom was thought of, their thought was that when you smash something it gets smaller but never disappears which is why they called it atomos which means "uncuttable".

J.J. Thompson

nhakak29_1_1 — 2024-02-12 17:10:21 UTC

On April 30, 1897 J.J. Thompson discovered electrons. He then also proposed a new structure for atoms.