CHM135H1 Chapter Notes - Chapter 1: Astatine, Tellurium, International System Of Units
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CHM135H1 Full Course Notes
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Chemistry: the study of the composition, properties, and transformations of matter. All matter is made of the currently present 114 elements found. Element: fundamental substance that cannot be chemically broken down into anything simpler: only 90 of the elements occur naturally; the others are made artificially using high- energy particle accelerators. Conclusions were drawn using the similarities between elements. Johann d bereiner observed that there were many triads, or groups of three elements, which had similar behaviors. Main groups: the two larger groups on the left, and the six larger groups on the right of the periodic table (life is based on many of these elements). Transitional metal groups: the ten smaller groups in the middle of the table. Inner transitional metal groups: the 14 groups that are pulled out and shown separately. 1. 4 some chemical properties of the elements.
