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ROBERT BROWN: THE BOTANIST (12/27/1773-6/10/1858) [[image:http://www.abc.net.au/navigators/img/nature/brown_sml.jpg width="140" height="187"]]
He was a Scottish botanist who made meaningful contributions. He discovered the celll nucleus and cytoplasmic streaming. He also had the first observation of the //Brownian Motion// in 1827. Important Experiments- Particle Theory, Brownian Motion.

==﻿J.J THOMSON: CHEMIST (12/18/1856-8/30/1940)== A British physisist Nobel Luareat. Known for finding the electron, and isotope. He was rewarded the Nobel Prize for Physics.

Atomic Structures: Proton- Posotively charged particle, found in the nucleus. Neutron- Has a relative mass of one. Also found in nucleus. Electron- Negligable mas,charge of negative one. Found outside the nucleus. Question: What makes atoms of different elements different? Answer: The number of protons it has.

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