PHYS 1010Q Lecture Notes - Lecture 12: Pressure Measurement, Unified Atomic Mass Unit, Nuclear Fission
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PHYS 1010Q Full Course Notes
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Document Summary
In a small drop of water, there are about 10 23 atoms. We know of 118 distinct types of atoms. These are the chemical elements we find on the periodic table of elements. 94 of them occur on earth naturally. Some of them barely exist on the earth. It is both toxic and a critical element to make a nuclear fission explosion. Several newer elements were named after russian scientists. There is an infinite amount of elements that can be made. You send two atoms together super fast and hope that they stick" together. The mass of an atom is usually given in amu (atomic mass unit) There are different types of hydrogen so we give the different kinds different names. Deuterium, it has 2 amu (1 neutron, 1 proton) Tritium, it has 3 amu (2 neutrons, 1 proton) Helium, it has 4 amu (2 neutrons, 2 protons) Atoms are usually clumped together, not just flying around on their own.
