Anthonee+B

= John Dalton= =September 6,1766 – July 27,1844= =**John Dalton was an English Chemist, Meteorologist and physcist. He is best known for his pioneering work in the development of modern atomic theory, and his research into color blindness.**= = = = = = = =**Atom Structure**=

===**The** **atom is a basic unit of matter that consists of a dense, central nucleus surrounded by a cloud of negativiely charged electron. The atomic nucleus contains a mix of positively charged protons and electrically neutral neutrons. The electrons of an atom are bound to the nucleus by the electricmagnetic field. Likewise, a group of atoms can remain bound to each other, forming a molecule. An atom containing an equal number of protons and electrons is electrically neutral, otherwise it has a positive charge or negative charge (electron excess) and is an ion. An atom is classified according to the number of protons and neutrons in its nucleus: the number of protons determines the chemical reaction, and the number of neutrons determines the isotope of the element.**===