Why This Astonishing Picture of an Atom Is a Scientific Milestone. It’s tiny, but it’s visible. By Avery Thompson Updated: Mar 31, 2023 1:49 PM EDT. 4. David Nadlinger - University of Oxford.

The atom was an unknowable mystery in the early 20th century when pioneers such as Niels Bohr began to pin down its nature. Scientists first “split the atom” in 1917 and realized that it had ...

Bohr’s Model of an Atom: Students get to know the Bohr’s Model of an Atom. Find out what are its limitations and the postulates it is based on.

Photo: Niels Bohr's research notes for his new atomic theory Rutherford's find came from a very strange experience. Everyone at that time imagined the atom as a "plum pudding." That is, it was ...