CHMA10H3 Chapter 9: Chapter 9
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CHMA10H3 Full Course Notes
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Chapter 9: the periodic table and some atomic properties. The basis of the pt is the e" configuration of the element s. 9-1 classifying elements: the periodic law and the pt: Periodic law: when elements are arranged in order of increasing atomic mass, certain sets of properties recur periodically. Molar volume: atomic mass of an element divided by the density of its solid form. Periodic law was based on molar volume ( atomic volume) Results represented by a graph of atomic volume against atomic mass ( molar volume against atomic number) Argon was the first noble gas discovered. Restated periodic law: similar properties recur periodically when elements are arranged according to increasing atomic number. Metals good conductors of heat/electricity, malleable, ductile, moderate-high mp. Non-metals non-conductors of heat/electricity , non-malleable, brittle solid or gas at room temp. Metalloids look like metals, behave like metals but have some non-metallic properties as well.
