1. The Periodic Table TEKS 8.5C interpret the arrangement of the Periodic Table, including groups and periods, to explain how properties are used to classify elements TEKS 8.5B identify that protons determine an element’s identity and valence electrons determine its chemical properties, including reactivity Video

2. The periodic table was created by Russian chemist, Dmitri Mendeleev. Mendeleev Song

3. Elements are represented with chemical symbols. Si Na Fe O C He NEW Element Song

4. Elements are arranged from left to right based on their atomic number.

5. The atomic number is the number of (positive) protons present in stable atoms. P = E

6. Protons determine the element’s identity!! ? ? ? ?

7. Here is the structure of the Periodic Table…

8. Columns

9. The columns on the Table are called groups. The groups are numbered from 1-18.

10. Elements in the same group have very similar properties and react the same. *Highlight this.

11. Columns go vertical.

12. The rows on the Table are called Periods.

13. Properties of elements gradually change as you go from left to right.

14. Going from left to right atoms smaller in size larger in mass

15. HORIZONTAL Periods go……

16. Elements are classified into three large groups. Elements are classified into three large groups. Major Groups

17. Metals

18. Metalloids

19. Nonmetals

20. Color the three groups on your Periodic Table and make a key. Metals=blue Metals=blue Nonmetals=green Nonmetals=green Metalloids=yellow Metalloids=yellow