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Definition
| most simple substance that cannot be broken down any further |
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Definition
| smallest unit of matter that still retains the properties of an element |
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Definition
| subatomic particle with a single positive (+) electrical charge |
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Definition
| subatomic particle with a single negative (-) electrical charge |
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Definition
| electrically neutral, and has no charge |
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Definition
| sum of the number of protons and neutrons in its nucleus |
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Definition
| number of protons/electrons in its nucleus |
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Term
| What are the 6 most abundant elements in living tissue |
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Definition
1. Carbon
2. Hydrogen
3. Nitrogen
4. Oxygen
5. Phosphorus
6. Sulfur |
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Term
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Definition
| Carbon-Hydrogen-Nitrogen-Oxygen-Phosporus-Sulfur |
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Term
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Definition
| a transfer of electrons from oppositely charged ions |
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Term
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Definition
| SHARING of electrons between atoms |
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Definition
| weak polar attraction between a hydrogen atom (+) and an electronegative atom (oxygen, nitrogen, florine) |
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Term
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Definition
| A bond between 2 atoms that have different electronegativities and therefore have unequal sharing of the bonding electron pair |
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Term
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Definition
| A bond between 2 atoms that have the same electronegativity and therefore have equal sharing of the bonding electron pair |
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Term
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Definition
| water loving - have an affinity to water and have polar side groups to their structure that will attract water. |
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Definition
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| properties of water that make it life supporting |
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Definition
- cohesion
- ability to moderate temp and insulate
- versatility as a solvent |
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Term
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Definition
| substances that release hydrogen ions (H+) |
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Term
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Definition
| substances that accept hydrogen ions resulting in the formation of hydroxide ions (OH-) |
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Term
| what does the pH scale measure? |
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Definition
| acidity or basidity (alkalinity) |
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Definition
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Definition
| minimize changes in pH (accepting when H+ is in excess and donating it when it is depleted) |
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