Questions to be answered after watching the video on properties of some representative elements. 1) Which groups in the periodic table are considered representative elements? 2) a) Give Three examples of the A group elements b) And B group elements 3) arrange the following elements in order of reactivity: K, Li, Ca, Mg, Na, Al most reactive) (least reactive) 4) a) what is the general trend in reactivity as one goes from top to bottom in the same group b) what is the general trend in reactivity as one goes from left to right in the same period 5) Do you thinkreactivity and the size of the atom are related? explain