around 2,500 years ago this Greek man called Democritus was sitting around just thinking. He was thinking about cutting stuff up and came up with the idea that there must be a point where you could no longer cut something any smaller. He named the atom after the Greek word atomos, which means that which can't be split. here...
a particle that cannot be divided or destroyed
The energy that comes from the radioactive decay of an atom can come from the electrons and can come from the strong force inside the nucleus.
All matter is formed from indivisible atoms.
== == The man who discovered that an atom is mostly empty space would be Rutherford.
Dative covalent bond
democritus
Its RADIOACTIVITY!! That was the first discovery that rejects the idea that the atom is indestructible
Democritus from Abdera
Robert Boyle
No device can give the complete structure of an atom but you can get a minute idea about the look of an atom using an Electron Microscope!
need a picture of ruthersford idea of what an atom looked like
450 b.c
Democritus
The idea of the atom was first developed by Greek philosophers Leucippus and Democritus in 5th century BC. Their idea was overlooked until Antoine Lavoisier's experiments were done in the 18th century.
John Dalton put forward the idea that each element is made of a different sort of atom. Each kind of atom had its own properties such as an individual mass.
manu
John Tompson