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 ...

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, ...

Later work by others built on this, showing that these energy levels are a fundamental part of how the universe works at the ...