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| 1a. When did people know about crystals like salt and quartz? |
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Definition
| 1a. People have known crystals like salt and quartz for centuries but it wasn’t until the 20 century |
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| 1b. century that crystals were interpreted as what? |
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Definition
1b. crystals were interpreted as
regular arrays of atoms and it was realized that so many materials are crystals such as metals and most minerals. |
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| 2a. X-ray diffraction patterns is what? |
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Definition
| 2a. reveal the arrangement of the atoms in the crystals |
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| 2b. what is the Bragg formula for? |
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Definition
| 2b. where scientists can determine from the diffraction pattern what the spacing of the atoms is |
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| 3a. what did Watson and Crick discovered? |
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Definition
| 3a. that DNA has a double-helix shape from the X-ray diffraction pattern. |
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| 4a. what is amorphous? and provide 3 main examples? |
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Definition
| 4a. No crystalline solids lack an orderly, repetitive arrangement of their basic particles |
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| 4b. provide 3 main examples? |
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Definition
| 4b. amorphous examples are rubber, glass, and plastic. |
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| 5a. Due partly to their amorphous structure, rubber is what? |
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Definition
| 5a. highly elastic and glass will slowly flow. |
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Definition
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| 6a. How do we find Density using mass and volume |
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Definition
| 6a. Density = mass / volume |
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Term
| 6b. Units formula are what? |
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Definition
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Term
| 7a. Give two examples of high and low density? |
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Definition
| 7a. high density Gold and lead. periodic table:(Au and Pb). Low Density aluminum and ice periodic table:((Al) |
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Term
| 7b. Iridium has the highest density at _____. |
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Definition
| 7b. 22.65 gm/cm^2 or almost 23 times denser than water |
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Term
| 8a. Why did alchemists figure lead was a more reasonable possibility to be transmuted into gold than, say, iron? |
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Definition
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Term
| 9a. How do you Weight density with weight and volume? |
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Definition
| 9a. Weight density = weight / volume. |
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| 9b. What are the Units Formula? |
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Definition
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| 10a. Which is denser, ice water or liquid water? |
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Definition
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| 11a. Which weighs more, a liter of ice water or a liter of liquid water? |
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Definition
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| 12a. Which has the greater density, 100 kg of lead or 1000 kg of aluminum? |
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Definition
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| 13a. What is the density of 1000 kg of liquid water? |
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Definition
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Definition
| 14a. What is the volume of 1000 kg of liquid water? |
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