1. Periodic Table in 3 Sections (1) Metals, (2) Metalloids, & (3) Nonmetals Metals: (on the left & middle) Nonmetals: (on the right) Metals (on the left and middle) Metalloids: (on the zig-zag line) Nonmetals (on the right) More Metals These are actually located above in the 6 th & 7 th periods (rows) in group (column) three)

2.  This atom has two electron shells.  The period number tells you the number of electron shells Lithium Atom  So it is located in the second period. Periods: The rows are called periods, and there are 7 of them

3.  There are 18 groups Groups: The columns are called groups (also called families) 123456789 101112131415161718 Notes SPI 0807.9.9 Periodic Table Science

4. 1 2 1314151617 18  The group number can reveal the number of valence electrons Note: However this only works for groups 1 to 2 and 13 to 18 (see below) This "trick" does not work with groups 3 to 12 (called transition metals) Memory Trick: Remember V =V V for vertical = V for valence electrons Notes SPI 0807.9.9 Periodic Table Science

5. 1 2 1314151617 Again, ignore groups 3 to 12 for now (called transition metals) Reactivity in Elements Groups 1 to 2 For groups 13 to 17:  Reactivity increases from left to right For groups 1 to 2:  Reactivity increases from right to left Groups 13 to 17 Non-reactive (Leave out group 18…they are non-reactive!)

6. 1 2 1314151617 Groups 3 to 12 (called transition metals) Group/Family Names Group 1: Alkali Metals Group 2: Alkaline-Earth Metals Groups 3 to 12: Transition Metals Groups 17 : Halogens Groups 18 : Noble Gases Groups 13 to 16: Named after the element at the top Example: Group 13 is the Boron group, 14 is the Carbon group 18