Mason+Pafiffer

1. History of an atom 1.1 Scientist that contributed to atoms. 1.2 A picture 1.3 He lived from 1856-1940. 1.4 JJ Thomas discovered the negative part of an atom.

He figured out that rays could be deflected because of cathode rays. That made him realize that atoms could be taken apart, so he tried by measure the particle's mass. Then he found out it was 2000 times lighter than any atoms. He performed them. He discovered everything within 2 years.

2. Atomic structure.

Different parts of an atom. -nucleus -electrons Different particles of an atom. -electrons -protrons -neutrons location -Protons are within the nucleus -The neutron is too. -The electrons are located on the outside of the nucleus