01:119:115 Lecture Notes - Lecture 2: Atomic Nucleus, Heat Capacity, Unified Atomic Mass Unit
15 Sep 2015
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Contains a negative charge around atomic nucleus. 3d space where electron is believed to be most often found. Found in designated shells separated from nucleus. Distance from nucleus determines potential energy (pe) It takes energy to move it away from nucleus, which will be returned back to molecule haas investment creating more pe. Two or more atoms in a fixed ratio. Emergent property: characteristics of products characteristics of individual molecules are not equal to. How much an atom wants an electron. O & f - both have high en. Difference in en between two atoms help determine bond types. All not strong in h2o, break off or dissolve in water. Direct sharing of electrons filling valence shells. Not as strong as covalent, only strong when in unison (team) Combination of h and o & n; h gets partial positive other component gets partial negative due to high en. Cohesion- water sticks to itself (surface tension)
