1. Atoms

2. https://www.youtube.com/watch?v=xazQRcSCRaY Atomic theory video

3. How small is an atom? http://www.ted.com/talks/just_how_small_is _an_atom# http://www.ted.com/talks/just_how_small_is _an_atom#

4. The Building Blocks of Matter: Atoms + + + + + + + - - - - -- - - +

5. Atoms Smallest possible unit into which matter can Made up of sub-atomic particles : –protons –neutrons –electrons + - + + + - - - - +

6. Protons (+) Positively charged particles Help make up the nucleus of the atom Help identify the atom (could be considered an atom’s DNA) Equal to the atomic number of the atom Contribute to the atomic mass Equal to the number of electrons + + + + + + + + - - - - -- - - +

7. Neutrons Neutral particles; have no electric charge Help make up the nucleus of the atom Contribute to the atomic mass + + + + + + + - - - - -- - - +

8. Electrons (-) Negatively charged particles Found outside the nucleus of the atom Equal to the number of protons - + + + + + + + - - - - -- - - +

9. The Atom’s “Center” Protons and neutrons are grouped together to form the “center” or nucleus of an atom. - + + + Notice that the electrons are not apart of the nucleus - -

10. Take out your Physical science textbook

11. The Periodic Table of Elements (pure substances that contain protons, electrons, and neutrons)

12. Atomic Number The number of protons in the nucleus of an atom + + + - - - What would be the atomic number of this atom?

13. Look at your copy of the periodic table each element (box) has an atomic number usually at the top of the box

14. Atomic Mass Number The total number of protons and neutrons in an atom’s nucleus + + + - - - What would be the mass number of this atom? +  3 3  4 4 3 protons + 4 neutrons = a mass number of 7

15. Look at your copy of the periodic table each element (box) has an atomic mass number usually at the bottom of the box

16. Label the periodic table Group 1:Alkali metals Most reactive metal Sodium and potassium most important for humans Lithium found in batteries and some medicine

17. Group 2: alkaline earth metals Not as reactive as group 1 Mg and Ca most common Group 3-12: transition metals Most are hard and shiny Less reactive Iron

18. Group 13: Boron family Aluminum Group 14: Carbon family Carbon Group 15: Nitrogen family Phosphorous Group 16: oxygen family Lungs

19. Group 17: Fluorine/Halogens family Salt forming Chlorine Group 18: noble gases Kings of the periodic table

20. 3 Classes of Elements ClassColor Metal Non-Metal Metalloid Using this as a guide, color code your periodic table to show the three classes. Start by highlighting the “zig-zag.”

21. Metals Location Found on the left of the zigzag line/staircase on the periodic table (exception  Hydrogen) ductile, good conductors, malleable, shiny, most are solid @ room temperature What metal is not a solid @ room temperature? Image taken from: http://chemistry.about.com/od/periodictableelements/ig/E lement-Photo-Gallery.--98/Sodium.htm 11 Na 22.990 79 Au 196.967

22. Non-Metals Location Most found to the right of the zigzag line/staircase on the periodic table not ductile or malleable, not shiny, poor conductors, most are solid Image taken from: http://nobel.scas.bcit.ca/resource/ptable/cl.htm Image taken from: https://www.dmr.nd.gov/ndgs/rockandmineral/sulfur.asp 16 S 32.066 17 Cl 35.453

23. Metalloids Location Border the zigzag line/staircase on the periodic table have properties of both metals and non-metals Image taken from: http://library.thinkquest.org/C0113863/bios.shtml Image taken from: http://library.thinkquest.org/C0113863/bios.shtml 5 B 10.811 14 Si 28.086

24. Period (Row) Seven periods on a periodic table (left to right or right to left)

25. Period (Row) each horizontal row of elements on the periodic table

26. Group or Family (Columns) Eighteen groups on the periodic table (top to bottom or bottom to top) Elements in groups or families have similar properties

27. each column of elements on the periodic table Group or (Family)

28. Identify the Element Period 2 – Group 14  Carbon - C Period 5 – Group 2  Strontium - Sr Group 17 – Period 6  Astatine - At Group 4 – Period 7  Rutherfordium - Rf

29. Bohr Models Niels Bohr created a visual model of the atom to make them easy to understand A Bohr Model contains a central nucleus surrounded by electron shells For each model you state the number of protons and neutrons in the nucleus and draw a dot on the electron shells for each electron

30. How many electrons each level can hold – 1 st energy level can hold 2 e- – The 2 nd can hold 8 e- – The 3 rd can hold 18 e- – The 4 th can hold 32 e-