1. Physical Science – Lecture 37 Electron Review

2. Review of Electrons The number of total electrons is equal to the atomic number. The number of valence electrons is equal to the group number when the element is found (1A=1, 2A=2, 3A=3, 4A=4, 5A=5, 6A=6, 7A=7, 8A=8).

3. Review of Electron Configuration The Large number stands for the shell that an electron is in. Ex) 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 The superscript stands for the number of electrons in that shell. Ex) 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 Therefore, there will be ____ electrons in the 1 st shell, ____ electrons in the 2 nd shell, ____ electrons in the 3 rd shell, and _____ electrons in the 4 th shell.

4. Review of Electron Configuration Each s gets 2 electrons. Each p gets 6 electrons. Each d gets 10 electrons. Each f gets 14 electrons. Add up the total number of subscripts to determine how many electrons you have.

5. Practice – Atomic Number 11 Each s gets 2 electrons. Each p gets 6 electrons. Each d gets 10 electrons. Each f gets 14 electrons. Add up the total number of subscripts to determine how many electrons you have.

6. Practice – Atomic Number 28 Each s gets 2 electrons. Each p gets 6 electrons. Each d gets 10 electrons. Each f gets 14 electrons. Add up the total number of subscripts to determine how many electrons you have.

7. Practice – Atomic Number 38 Each s gets 2 electrons. Each p gets 6 electrons. Each d gets 10 electrons. Each f gets 14 electrons. Add up the total number of subscripts to determine how many electrons you have.

8. Practice – Atomic Number 14 Each s gets 2 electrons. Each p gets 6 electrons. Each d gets 10 electrons. Each f gets 14 electrons. Add up the total number of subscripts to determine how many electrons you have.

9. Practice – Atomic Number 52 Each s gets 2 electrons. Each p gets 6 electrons. Each d gets 10 electrons. Each f gets 14 electrons. Add up the total number of subscripts to determine how many electrons you have.

10. Practice – Atomic Number 47 Each s gets 2 electrons. Each p gets 6 electrons. Each d gets 10 electrons. Each f gets 14 electrons. Add up the total number of subscripts to determine how many electrons you have.

11. Practice – Atomic Number 35 Each s gets 2 electrons. Each p gets 6 electrons. Each d gets 10 electrons. Each f gets 14 electrons. Add up the total number of subscripts to determine how many electrons you have.

12. Review of Valence Electrons 1A = 1 valence electron 2A = 2 valence electrons 3A = 3 valence electrons 4A = 4 valence electrons 5A = 5 valence electrons 6A = 6 valence electrons 7A = 7 valence electrons 8A = 8 valence electrons

13. Group Numbers are Labeled 1A 2A 7A6A 8A 5A4A3A

14. How many valence electrons are in Cl? 1A 2A 7A6A 8A 5A4A3A

15. How many valence electrons are in Te? 1A 2A 7A6A 8A 5A4A3A

16. How many valence electrons are in Mg? 1A 2A 7A6A 8A 5A4A3A

17. How many valence electrons are in Ba? 1A 2A 7A6A 8A 5A4A3A

18. How many valence electrons are in C? 1A 2A 7A6A 8A 5A4A3A

19. How many valence electrons are in Br? 1A 2A 7A6A 8A 5A4A3A

20. How many valence electrons are in Be? 1A 2A 7A6A 8A 5A4A3A

21. How many valence electrons are in K? 1A 2A 7A6A 8A 5A4A3A

22. How many valence electrons are in Ge? 1A 2A 7A6A 8A 5A4A3A

23. Review of Electron Dot Structures (1A) (2A) (3A) (4A) (5A) (6A) (7A) (8A)

24. Practice B

25. F

26. C

27. P

28. Be

29. Practice K

30. S

31. Al

32. Practice Ne

33. Pop Quiz

34. 1. How many total electrons does copper have if its atomic number is 29 and it’s mass number is 64?

35. 2. What is the electron configuration for Chlorine – Atomic number 17? Each s gets 2 electrons. Each p gets 6 electrons. Each d gets 10 electrons. Each f gets 14 electrons. Add up the total number of subscripts to determine how many electrons you have.

36. 3. Draw the electrons in their correct shells - Atomic Number 23 Each s gets 2 electrons. Each p gets 6 electrons. Each d gets 10 electrons. Each f gets 14 electrons. Add up the total number of subscripts to determine how many electrons you have.

37. 4. How many valence electrons are in Br? 1A 2A 7A6A 8A 5A4A3A

38. 5. Draw the electron dot structure for Ar Ar

39. Pass Your Papers Up.