History of Atomic Theory

Write a brief history of the development of the atomic theory. Starting with Aristotle’s ideas and including JJ Thompsons’ discovery of the electron giving us the plumb pudding model and Rutherford’s scattering experiment giving the idea of the nucleus.

Scientists and microbes

History and microbes

Louis Pasteur (1822-95)

Proved decay was caused by microbes in the air

Said if microbes got in body, they would cause disease, so need to prevent their entry

Joseph Lister (1827-1912)

Developed ideas of antibiotics which are solutions that kill microbes (e.g. Dettol)

Lister was a surgeon and he sprayed his instruments with carbolic acid, and this reduced infection after operations

Alexander Fleming (1881-1955)

Left an agar plate out which had bacteria growing on it, and a mould grew which caused bacteria around it to die.

The mould (Penicillium notatum) was producing penicillin and this killed bacteria

For homework you will need to carry out further research and add to these notes.