1. Physical Science Periodic Table

2. Periodic table Groups – vertical columns and have similar properties Period – horizontal rows, properties vary across a period

4. Periodic table Letter A – main group elements B – transition metals

6. Periodic table

7. Alkali metals – first group, very reactive Alkaline earths – second group Halogens – group seven (17) very reactive Noble gasses – group 8 (18) non reactive

9. Periodic table

10. Periodic Trends Atomic Size – due to the number of shells of electrons and their attraction to the nucleus

11. Periodic Trends Ionization energy – The energy required to remove an electron from an atom

12. Periodic Trends Electronegativity – how attracted an atom is for a pair of shared electrons

13. Periodic Trends Density of atoms – mass/volume