2. 2/3 Metals 1/3 non metalls 2 liquids Hg & Br

3. Periods Groups Run from left to right across the p.t. Periods = energy levels You see the greatest differences among the elements as you move across the periods Run up and down Last digit of group numbers = # of val e - (Except __________ **You see the greatest similarities within a group (due to the same of Val e-) Also see the fastest change from NM-M (grps 13-16)

4. 1.Alkali Metals a)Most reactive metals b)+1 oxidation number c)Form oxides with the general formula of M 2 O 2.Alkaline Earth Metal a)Reactive, not like Group 1 b)+2 oxidation number c)Form oxides with the general formula MO 3 – 12. Transitional Elements a)Fill multiple energy levels at a time b)*** Always yield pretty colors 13 -16. Metalloids a)Characteristics of metals and non- metals

5. 17. Halogens a)Most reactive non metals (F) b)Oxidations numbers (-1) c)Practice 18. Noble Gases (Inert Gas) a)Most stable b)Full octet of 8 valence electrons