atch video 1: the periodic table: classification of elements: khan academy 1. around your periodic table label and explain and color code a-i a. groups i. number all the groups on the periodic table b. period c. alkali metals i. where are they (group) (color code your periodic table on the page) ii. describe their characteristics and reactivity d. alkali earth metals i. where are they (group) (color code your periodic table on the page) ii. describe their characteristics and reactivity e. metals i. where are they (color code your periodic table on the page) ii. describe their characteristics and reactivity f. non-metals i. where are they (color code your periodic table on the page) ii. describe their characteristics and reactivity g. halogens i. where are they (group) (color code your periodic table on the page) ii. describe their characteristics and reactivity h. nobel gases i. where are they (group) (color code your periodic table on the page) ii. describe their characteristics and reactivity i. metalloids i. where are they (group) (color code your periodic table on the page) ii. describe their characteristics and reactivity what