1. Have a Periodic Table & a calculator per group!

2.  The mass number

3.  true

4. 2.75 g Al 1 mol Al 27 g Al 27 g Al = 0.102 mol Al = 0.102 mol Al

5.  6.02X10 23 Al atoms

6.  Protons & neutrons

7.  The Nuclear Model

8.  positive

9.  The Plum Pudding Model

10. 0.75 mol Na 6.02x10 23 atoms Na 1 mol Na 1 mol Na = 4.5x10 23 mol Na = 4.5x10 23 mol Na

11.  proton

12.  grams

13.  amu (atomic mass unit)

14. 2.5x10 15 atoms of Au 1 mol Au 6.02x10 23 atoms Au 6.02x10 23 atoms Au = 4.0x10 -9 mol Au = 4.0x10 -9 mol Au

15.  Neutrons

16.  J.J. Thomson

17.  Ernest Rutherford

18.  John Dalton

19.  Plum Pudding Model

20.  All matter is composed of atoms  Atoms can’t be divided, created or destroyed  Atoms of different elements combine in simple whole-number ratios to form compounds  Atoms are identical in mass  Atoms can be combined, separated or rearranged

21.  NO!!

22.  Atoms of the same element can have different masses – isotopes  Atoms are divisible – Nuclear chem.  Atoms can be changed from one element to another- Nuclear chem.

23.  James Chadwick

24.  J.J. Thomson

25.  Theory

26.  Cathode Ray Tube

27.  8 8 8 8

28.  Mass Number

29.  Consisted of a cloud of evenly distributed positive charge with the negative electrons embedded randomly in it.

30.  one mole = molar mass

31.  The Plum Pudding Model

32.  56 Fe Fe26

33. 0.25 mol Pb 207 g Pb 1 mol Pb 1 mol Pb = 51.75 g Pb = 51.75 g Pb

34.  Cathode rays were attracted to the positive charge

35.  Cathode rays have a NEGATIVE charge

36.  beam of electrons

37.  7 7 7 7

38.  Democritus

39.  Atoms are mostly empty space

40.  the atom has a small dense positive region that caused the positive particles to bounce back…..the nucleus

41.  An atom makes up an element.  An element can’t be broken down.

42.  positive

43.  one mole = 6.02 X 10 23 atoms

44.  neutral

45.  MOLE!!

46.  Scientific Law

47.  NUCLEUS

48.  Suggested that the electrons travel around the positively charged nucleus.  Difference is that the positive charges are NOT spread out like in Thomson’s Plum Pudding Model.

49.  NEUTRONS!

50.  The number of protons and electrons are the same!

51.  Their mass number

52.  Carbon - 14

53.  11

54.  6 6 6 6

55.  Molar Mass

56.  the mass number

57. Nuclear Symbol Atomic Number Protons Mass Number NeutronsElectrons 713 911 7 76 9 19 4019 20 F9 13 N7 20 9 40 K19 2119

58.  Average atomic mass

59.  1 atomic mass unit (amu)

60.  negative