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Definition
| Substance which cannot be broken down into other substances by chemical reactions. 92 natrually occurring elements (102 total) |
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| Smallest unit of an element that hass all its properties |
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| Contains protons, neutrons, positive overall charge and accounts for 99% of the mass of an atom |
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Definition
| Positively charged subatomic particle. 1 AMU |
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Definition
| Neutral charge subatomic particle. 1 AMU |
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| Negatively charged. Does not have a weight. |
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| The number of protons in an atom |
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| number of protons and neutrons in an atom |
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Definition
| Contains a different number of neutrons thatn the original element and therefore has different mass numbers, but the same atomic number. |
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Definition
Bond formed between atoms in which electrons are shared. Very strong bond, especially in biological systems. Example: Water.
Generally have the same orientation for a given pair of elements (same angle, lenght and direction). |
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Definition
| Measure of how badly an atom wants an electron |
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Definition
| One atom "takes" an electron from another. Happens because of huge differences in electronegativity. |
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Definition
| Gave up an electron. Positively Charged. |
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Definition
| Took an electron. Negatively Charged. |
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| a liquid that is a homogenous mixtrue of 2 or more substances. |
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Definition
| the dissolving agent of a solution |
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Definition
| What is being dissolved (salt, sugar) |
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Definition
| Amount of substance in grams taht equals the substance's molecular weight. |
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| Proton Donor. Dissolves in Water. High hydrogen concentration. pH level from 0-6 |
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Definition
| Proton Acceptor. High OH concentration. pH level from 8-14 |
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Definition
| Substance that resist pH changes. Blood and Urine. |
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Definition
| Hydrogens that are bonded to Hydrogens. Weak unless you have a lot of them. |
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Definition
| the amount of heat required to raise 1 gram of substance 1 degree Celsius. |
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Definition
| atomic mass number, aka Dalton. Equal to 1.7x10(^24) |
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| 6 elements of living things |
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Definition
| Carbon, hydrogen, nitrogen, oxygen, phosphorus, and sulfur. |
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Definition
| A radioactive isotope of an element. |
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Definition
1st: 2 electrons.
2nd: 8 electrons |
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Definition
1st: 2 electrons.
2nd: 8 electrons |
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Definition
| Outermost electron shell. Typically contains 8 electrons. |
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Definition
| Pull between a nucleus and an electron. Higher electronegativities means a stronger pull. |
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Definition
| Similar electronegativies. Generally occurs when the molecule consists of the same or similar atoms, such as O2. |
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Definition
| When electrons are drawn to a certain nucleus. Ex: Water. Oxygen has a higher electronegativity than Hydrogen. Thus, the electons from H will spend more time near the nucleus of O, giving O a slightly negative charge and H a slightly positive charge. |
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Definition
| The capactity to do work. |
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