1. Head a paper for class notes Record all drawings and data charts in notes Record any writing that is in yellow You do not need to record all of the examples at the very end but you should check your understanding using them

2. INSIDE THE ATOM

3. NUCLEUS

4. THE NUCLEUS IS. THE CENTER. OF THE ATOM

5. TODAY’S MODEL SAYS THE NUCLEUS CONTAINS TWO KINDS OF SUBATOMIC PARTICLES...

6. SUBATOMIC PARTICLES ARE THE TINY PARTICLES THAT MAKE UP THE ATOM

7. + PROTON

8. POSITIVE ONE A.M.U. IN THE NUCLEUS

9. + NEUTRON

10. NEUTRAL ONE A.M.U. IN THE NUCLEUS

11. ELECTRON -

12. NEGATIVE1/2000 A.M.U. ORBITS AROUND NUCLEUS

13. ELECTRONNEGATIVE 1/2000 A.M.U. ORBITS AROUND NUCLEUS PROTON NEUTRON POSITIVE NEUTRAL ONE A.M.U. IN THE NUCLEUS IN THE NUCLEUS 3 MAIN SUBATOMIC PARTICLES ONE A.M.U.

14. HYDROGEN H 11

15. H 11 ATOMIC NUMBER

16. THE ATOMIC NUMBER IS EQUAL TO THE NUMBER OF PROTONS AN ATOM HAS. THE NUMBER OF PROTONS IS WHAT DETERMINES WHAT ELEMENT IT IS

17. HYDROGEN H 11 MASS NUMBER

18. THE MASS NUMBER EQUALS THE NUMBER OF PROTONS PLUS THE NUMBER OF NEUTRONS SO # OF NEUTRONS = MASS # - ATOMIC #

19. ATOMS DO NOT HAVE AN OVERALL CHARGE SO THE NUMBER OF ELECTRONS… IS THE SAME AS THE NUMBER OF PROTONS (OR THE ATOMIC #)

20. HYDROGEN H 1 1 HOW MANY: PROTONS? 1 ELECTRONS?1 NEUTRONS?0

21. + HYDROGEN -

22. LITHIUM Li 3 7 HOW MANY: PROTONS? 3 ELECTRONS?3 NEUTRONS?4

23. ARSENIC As 33 75 HOW MANY: PROTONS? 33 NEUTRONS?42 ELECTRONS?33

24. Bromine Br 35 80 HOW MANY: PROTONS? 35 ELECTRONS?35 NEUTRONS?45

25. INDIUM In 49 115 HOW MANY : # NEGATIVE CHARGES ? 49 # NEUTRAL CHARGES? 66 WHAT ELSE ? # PROTONS 49

26. FLUORINE F 9 19 WHAT IS: ATOMIC # ? 9 MASS NUMBER? 19 # OF NEGATIVE CHARGES? 9