Unit 1 Flashcards
1
Q
John Dalton
A
- Law of Multiple Proportions
- Atomic Theory
- Sphere Model
2
Q
J.J Thomson
A
- Cathode Ray Tube
- Gas in tube became electrical conductors
- Neg charged electricity, E
- Plum Pudding
3
Q
Ernest Rutherford
A
- Gold Foil Experiment
- Protons
- Nuclear Model
4
Q
Niels Bohr
A
- Studied way H give off light through prism
- E have orbits bc of wavelength H gas
- Bohr Model
5
Q
James Chadwick
A
- Be w/alpha particles
- Resulting radiation lead to N
- Completed Model
6
Q
Johann Dobreiner
A
Group of Triads
7
Q
John Newlands
A
Atomic Weight, Law of Octaves
8
Q
Dimitriv Mendeelev
A
Table template by atomic weight
9
Q
Henry Moseley
A
Atomic number, including properties
10
Q
Radioisotopes
A
Unstable nucleus bc high proportions of N to P
11
Q
A-Decay
A
- Loss of He-4
- Stopped by paper/clothing
12
Q
B-Decay
A
- Emits -1E
- Body tissue, stopped by metal foil
- N taken from nucleus, turns into P
13
Q
Positron Emission
A
- Emits +1E
- Turns P to N ejecting positron and e neutrino
14
Q
G-Decay
A
- Emits A or B w/gammy rays
- Passes body, less intense by lead/concrete
15
Q
Electron Capture
A
- Captures E, combines w/P to make N and neutrino
- Releases G rays
16
Q
Fission Reactions
A
Nuclei split two = masses
17
Q
Fusion Reactions
A
Nuclei combines
18
Q
Atomic Radius
A
d of nucleus and v shell
19
Q
General Trend of AR
A
Decreases across, Increases Down
20
Q
Ionization Energy
A
NRG to remove E
21
Q
General Trend of IE
A
Increases Across, Decreases Down
22
Q
Electron Affinity
A
NRG to add E
23
Q
General Trend of EA
A
Increases Across, Decreases Down
24
Q
Electronegativity
A
Power to attract E in molecule
25
General Trend of EN
Increases Across, Decreases Down
