CHMA10H3 Chapter Notes - Chapter 8: Dmitri Mendeleev, Chemical Element, Mendeleev'S Predicted Elements

• School: UTSC
• Department: Chemistry
• Course: CHMA10H3
• Professor: Heinz- Bernhard Kraatz

Document Summary

M = metal / nm = nonmetal / m/nm = metalloid a = acidic oxide / b = basic oxide / a/b = amphoteric oxide. Mendeleev"s periodic law allows us to predict what the properties of an element will be based on its position on the table. Quantum mechanics is a theory that explains why the periodic trends in the properties exist: knowing why allows us to predict what. 8. 3 e- configurations, valence e- and the periodic table. [fig8. 3] outer electron configurations of the first 18 elements in the periodic table. Writing an electron configuration for an element from its position in the periodic table: [fig8. 5] elements that form ions w/ predictable charges. The properties of elements follow a periodic pattern: elements in the same column have similar properties, elements in a period show a pattern that repeats. Quantum-mechanical model explains this b/c the # of valence e- & types of orbitals they occupy are also periodic.