1. IONS...

3. red and green are opposites

4. assume red and green cancel each other
net color = neutral

5. take away one red

6. take away one red
net color = 1 green

7. take away two red

8. take away two red
net color = 2 green

10. net color = neutral

11. Add 2 red = net color ?

12. net color = 2 red

13. in this arrangement…

14. green is trapped inside.
Only red balls
can be added or
taken away…

15. green represents the
nucleus…

16. Take away two red…

17. Net color = 2 green

18. 5 green = 5 red

19. add 1 red

20. Net color = 1 red

22. color = ?

23. 3 red

24. color = ?

25. 3 green

26. IONS...

27. What does that have to do with chemistry??

28. In order to understand
what ions are,
we need to know that…

29. positive or negative charge
the particles
that make up atoms
have either
positive or negative charge +

30. positive and negative are opposites+ +
they cancel each other out + + +

31. +
net charge = zero + + + +

32. the positive (+) particle is called a
proton +

33. the negative (-) particle is called an
electron

34. in an atom, protons ( ) are in the center and electrons ( )
are on the outside + + + + + +

35. only electrons ( )
can be added
or taken away + + + + +

36. this is an atom with
5 electrons and
5 protons + + + + +

37. the atom is neutral
net charge = zero + + + + +

38. 5 (-) and 5 (+) = zero charge (neutral)

39. + + + + +

40. Add 1 electron + + + + +

41. charge = ? + + + + +

42. charge = 1- (one minus) + + + + +

43. Neutral + + + + +

44. + + + + +

45. charge = ? + + + +

46. 2+ (two plus) + + + + +

47. WHEN REMOVING ELECTRONS

48. WHEN REMOVING ELECTRONS
THE RESULTING CHARGE IS POSITIVE

49. WHEN REMOVING ELECTRONS
THE RESULTING CHARGE IS POSITIVE 1+
neutral

50. WHEN ADDING ELECTRONS

51. WHEN ADDING ELECTRONS
THE RESULTING CHARGE IS NEGATIVE

52. WHEN ADDING ELECTRONS
THE RESULTING CHARGE IS NEGATIVE 2
neutral

53. An atom with positive or negative charge
is called an
ION
drum roll

54. Atoms with positive or negative charge
SO...
Atoms without charge are called ATOMS
Atoms with positive or negative charge
are called IONS

55. The number of protons in an
AND...
Notice that ONLY the number of e- changes
(Only electrons are added or subtracted)
The number of protons in an
Atom NEVER changes
(why?)

56. To be Noble...
Electrons change to act like the noble gases
isoelectronic

57. What do IONS have to do with anything??

58. ions make up the salt you put on your eggs in
the morning

59. ions are required for your brain to function
(ions allow you to see and understand this presentation)

60. ions are an essential ingredient in soap

61. ions are required for cellular respiration

62. ions make up acids and bases

63. ions keep your blood functioning

64. ions make up the salt you put on your eggs in
ions are required for your brain to function
(ions allow you to see and understand this presentation)
ions are an essential ingredient in soap
ions are required for cellular respiration
ions make up acids and bases
ions keep your blood functioning
the morning