32. Democritus thought that Atoms move though empty space composed of matter, while
Dalton thought that matter is composed of atoms.
34. The technology didn't exist at the time.
36. His theory said that atoms aren't indivisible and all atoms of an element are not
exactly the same.
38. Matter is anything that has mass and takes up space. A door and a table.
40. It was evenly distributed.
42. a. Electron cloud
b. Protons
c. Neutrons
44. The number of protons equals the number of electrons so it's neutral.
46. Protons and neutrons.
48. The electron
50. The Anode attracts negatively charged electrons.
52. The positively charged gold nuclei.
54. The nucleus because it has a positive charge.
56. By using the scanning tunneling …show more content…
60. Mass equal the number of protons plus the number of neutrons.
62. The superscript is the mass number and the subscript is the atomic number.
64. Yes p, because the elements are the same and they have the same number of
protons.
66. There are 44 protons and 44 electrons.
68. The mass number is 200.
70. It would have 18 protons.
72.
74. Gallium-69: Electrons: 31, Protons: 31, Neutrons: 33
Fluorine-23: Electrons: 9, Protons: 9, Neutrons: 14
Titanium-48: Electrons: 22, Protons: 22, Neutrons: 26
Tantalum-181: Electrons: 73, Protons: 73, Neutrons: 108
76. Ga-69, because its atomic mass is closer to the atomic mass of gallium, than Ga-71
is.
78. Cr-50 = 0.0435 x 49.946 amu = 2.17
Cr-52 = 0.8379 x 51.941 amu = 43.52
Cr-53 = 0.0950 x 52.941 amu = 5.03
Cr-54 = 0.0236 x 53.939 amu = 1.27
Total = 51.99 amu
80. When the neutron-to-proton ratios is too big or too small, it would cause an element to
become radioactive
82. An alpha particle is a helium atom with a 2+ charge, a beta particle is an electron with
a 1- charge, and gamma rays are high energy radiation without a charge.
84. A nuclear reaction.
86. Its neutron-to-proton