MATLS 1M03 Lecture Notes - Lecture 6: Ionic Bonding, Hydrogen Bond, Electrostatics
9 Jul 2016
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Document Summary
Atomic number (z: each chemical element is characterized by the number of protons in the nucleus or the atomic number (z) For an electrically neutral or complete atom, the atomic number also equals the number also equals the number of electrons. Protons, neutrons and electrons are composed of other subatomic particles such as quarks, neutrons within the nucleus. Isotopes: atoms of some elements have two or more different atomic masses, which are called isotopes. The atomic weight of an element corresponds to the weighted average of the atomic masses of the atoms naturally occurring isotopes. Atomic mass unit may be used to compute atomic weight. With this scheme, the masses of protons and neutrons are slightly greater than unity, and: a=z+n. Use mols to identify amu/atom or g/mol. There is an establishment of a set of principles and laws that govern systems of atomic and subatomic entities that came to be known as quantum mechanics.
