1. The Periodic table of Elements By: Mr. Castillo & Mr. Buenrostro

2. Ready to get started?

3. Periodic table of Elements Think back over the last week……. We learned atoms are made of neutrons, protons, and electrons. We also learned their locations and charges. We learned that their properties are linked to the number and type of particles. Now, lets learn about the world of elements…….

4. Periodic table of Elements Table of elements: a list of all the elements in the universe organized by the properties of their atoms. -Remember the particles of an atom?? -Remember the protons, neutrons, and electrons? The arrangement and number of an atom’s particles makes one element different from the other.

5. Questions? Organized…..Arrangement???? What do those big college words mean?

6. Organized & Arrangement Means to place something in a location by type, category, or property. Example: How is a grocery stores is arranged?

7. Organized & Arrangement The produce section for fruits and vegetables, meats, bakery, and dairy are all arranged by their similar properties.

8. Periodic Table of Elements Scientist used this concept (idea) to organize and arrange all the known elements of the universe into a table that made sense. Uh-Huh!!!

9. Periodic Table of Elements Not that type of table. Table: data arranged in rows and columns

10. Elements 3 Lithium 6.941 Atomic Number Atomic Mass Atomic Number: Number of protons in an atom. Identifies the element. Atomic Mass: Number of protons and Neutrons found in the nucleus. A=P=E:Atomic Number= Protons = Electrons ; 3 = 3+ = 3- Atoms Symbol Atoms Name

11. Arrangement of Particles 3 Lithium 6.941 4 Beryllium 9.012 How are these atoms different??

12. Element: a pure substance made of only one kind of atom. A natural or synthetic substance that cannot be broken down into simpler materials; has unique properties. Elements

13. What type of arrangement do you see? Patterns? Table of Elements

14. The Table of Elements is divided into two main categories: Periods and Groups Table of Elements

15. Groups and Periods numbers Group number: The numbers above each vertical column giving the number of outer valence electrons in each element. There are 18 groups. Period number: The numbers beside each horizontal row that lists the number of electron shells. There are 7 periods.

16. Groups and Periods Groups: vertical columns that organize atoms with similar number of valence electrons. 1A

17. Group Numbers (top) Find the number of Valence Electrons.

18. Groups and Periods Periods: horizontal rows that organize atoms with similar number of electron energy shells. 123123 OCS

19. Periods Numbers (side) Find the number of Orbits, Clouds, Shell.

20. What kind of pattern do you see here? 12 1 2 3 Column Row

21. Valence electrons Valence electrons: electrons in the outer most or last electron shell (OCS). The group number (ones place) equals valence electrons. Valence electrons determine an elements chemical properties, including reactivity. Involved in bonding

22. Valence Electrons What is the red arrow showing? Electron on 1 st inner shell Electron on 2 nd shell Electron on 3rd outer shell NUCLEUS Victor Valence goes to the edge

23. Valence Electron(s) & Shells How many orbits and Valence electrons do you see here?

24. Electron Configuration Electrons occupy different energy levels (shell) around the nucleus of the atom. Each energy level can hold a specific number of electrons. The first Shell/ level holds 2 The second shell / level holds 8 The third shell / level holds 18

25. Battleship PERIODS AND GROUPS! What element is at Group 9 Period 5? Rhodium(Rh) What element is at Group 12 Period 6? Mercury (Hg)

26. Groups and Victor Valence What element is at Group 2 Period 2? Beryllium (Be) SO ….. How many electrons DARED to go to the EDGE? Hmmmmm

27. Start COUNTING! Group ? Period ?

28. Any Questions