Quantum mechanics explains why the electrons can keep spinning indefinitely. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. An atom is best ...

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 roughly ...

Why does changing just one proton in the nucleus of an atom create a different element? The number of protons in an atomic nucleus determines the number of electrons needed for a neutral atom, ...

Note: This video is designed to help the teacher better understand the lesson and is NOT intended to be shown to students. It includes observations and conclusions that students are meant to make on ...

On Tuesday the field of quantum mechanics received a thoughtful 100th-birthday present from the Royal Swedish Academy of Sciences: three shiny new medals, 11 million Swedish kronor (to be divided ...