2. Objective 1: Locate the different families of main-group elements, on the periodic table, describe their characteristic properties, and relate their properties to their electron configurations.
3. Periods and Blocks of the Periodic Table p1 p6 s1 s2 s2 1 d1 d10 2 3 3 4 4 5 5 6 7 4 Periods = energy levels 5 f 1 f 14
29. f-block elements: Lanthanide and Actinides Wedged between groups 3 and 4 in the sixth and seventh periods 14 f-block elements in each of the series Actinides are all radioactive Only first 4 actinides have been found naturally on earth Lanthanides are shiny metals similar to alkaline earth metals f-block Samarium Uranium