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William Chua
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Like the PF logo...William Chua said:I see it in almost every logo that has something to do with science.
I think it *is* just a logo, based on that Bohr sketch on the right.William Chua said:I I see it in almost every logo that has something to do with science. But I can't figure out who really first drew that picture. Was it Bohr? Or Rutherford? Or maybe someone else?
Hahaha! Thanks for pointing that out. I didn't notice that!berkeman said:Like the PF logo...
Pretty sure it was @Greg Bernhardt when he updated the forum software about a year ago...William Chua said:Hahaha! Thanks for pointing that out. I didn't notice that!
But, really, I'm curious who made that drawing first and when.
But I'm also pretty sure @Greg Bernhardt is too young to have done it first.berkeman said:Pretty sure it was @Greg Bernhardt when he updated the forum software about a year ago...
William Chua said:But I'm also pretty sure @Greg Bernhardt is too young to have done it first.
A circle viewed obliquely appears elliptical.DrClaude said:What puzzles me is that the drawing uses ellipses to represent the orbits, while Bohr's orbits are circular. So in a sense, it doesn't correspond to any actual theory that was proposed about the atom.
Didn't Sommerfeld's extension of the original Bohr model use elliptical orbits?DrClaude said:What puzzles me is that the drawing uses ellipses to represent the orbits, while Bohr's orbits are circular. So in a sense, it doesn't correspond to any actual theory that was proposed about the atom.
The first model of the atom was drawn by John Dalton in the early 1800s. However, his model was later revised by J.J. Thomson, Ernest Rutherford, and Niels Bohr.
Dalton's model proposed that atoms were tiny, indivisible particles that made up all matter. He depicted atoms as small, solid spheres with no internal structure.
Thomson's model, known as the "plum pudding" model, proposed that atoms were made up of positively charged material with negatively charged electrons scattered throughout. This was a significant departure from Dalton's solid sphere model.
Ernest Rutherford is credited with discovering the atomic nucleus in 1911. He proposed a model in which the majority of the atom's mass was concentrated in a small, dense nucleus with electrons orbiting around it.
Bohr's model, developed in 1913, incorporated the concept of energy levels, in which electrons could only exist in specific orbits around the nucleus. This model helped to explain the stability of atoms and laid the foundation for modern atomic theory.