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Jerry/s Unit 2 Study
Unit 2
| Question | Answer |
|---|---|
| 1.) Who used the "Gold Foil" experiment with alpha particles? | Rutherford |
| 2.) Who discovered there are external negative electrons? | Thomson |
| 3.) Who was the first person to suggest an atom? | Democratis |
| 4.) Who was responsible for discovering the nucleus? | Rutherford |
| 5.) Who was responsible for proving that atoms existed, and came up with 4 postulates? | Dalton |
| 6.) Give the locations of the protons, neutrons, and electrons in an atom. | Electrons- e- cloud, outside of nucleus. Protons and Neutrons- inside nucleus. |
| 7.) Which is/are the largest, and smallest: protons, neutrons, or electrons? | Protons and Neutrons are BIG. Electrons are SMALL |
| 8.) Why ISN"T the mass number for oxygen 15.9994? | Protons plus neutrons will give you the mass number. 15.9994 is the average mass. |
| 9.) How do you find the number of neutrons in an atom? | Mass-protons=neutrons |
| 10.) How many groups are on the periodic table? | 18 |
| 11.) How many rows are in the periodic table? | 7 |
| 12.) Are groups horizontal or vertical? | Vertical |
| 13.) Are rows horizontal or vertical? | Horizontal |
| 14.) Look at your periodic table for #'s 14-16. How many protons and neutrons are in: 172Lu? | Protons=71 Neutrons=101 |
| 15.) How many protons and neutrons are in: 175Lu? | Protons=71 Neutrons=104 |
| 16.) How many protons and neutrons are in: 179Lu? | Protons=71 Neutrons=108 |
Created by:
Jstewart02005
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