PHYS 1010 Lecture Notes - Lecture 23: Scanning Tunneling Microscope, Atomic Nucleus, Meteorology
29 Nov 2016
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Document Summary
First thought by aristotle to be a combination of four elements (earth, fire, water, air) Thought to be composed of atoms by greeks from the fifth century bc. Further proposed as atoms in 1800"s by meteorologist and schoolteacher john. Too small to be seen with visible light. As chains of individual thorius atoms in a 1970 electron micrograph image. Revealed as ripples in rngs by scanning tunneling microscope in the mid 1980"s. Classical model has a nucleus at the center, surrounded by electrons. In a positively charged state = a proton. Positive charges repel positive charges and attract negative. The study of the fundamental building blocks of the universe and how those building blocks interact. The entire universe is made up of quarks and leptons (matter particles) Interactions are represented as the exchange of force- carrying bosons. Refer to particles that make up a substance. Composed of only one kind of atom. Composition of living things include these 5 elements:
