The size of an atom is only a few angstroms at most - there are 10 billion angstroms in 1 metre. This video also looks at the basic parts of an atom (protons, neutrons and electrons) and why the ...

It has been used for more than 120 years, she said, to acknowledge scientists who identified and manipulated the parts of an atom, which was once the smallest known particle of matter. J.J ...

New evidence The discovery of electrons. Changes to the atomic model Atoms can be broken down into smaller parts. An atom is made of tiny negatively charged electrons dotted about a positively ...