Around 400 BC, Democritus claimed that matter is made of tiny, hard particles called “atomos”
Hello, I’m Democritus, matter is made up of tiny particles called “atomos
In 1932, James Chadwick discovered the neutrons found inside the nucleus.
The neutrons are in the nucleus and are uncharged giving them their name.
The current atomic theory is that all matter is made up of atoms, all atoms of the same element are identical in mass and property, and also that compounds are formed by a combination of two or more elements.