Chapter Two Biology
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Created by:
bballgirl612 on October 1, 2012
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20 terms
Terms | Definitions |
|---|---|
 element | substance consisting of entirely one type of atom |
| mass number | sum of protons and neutrons in the nucleus of an atom |
| six properties of water | adhesion, cohesion, capillary action, high surface tension, holds heat to regulate temperature, less dense as a solid than a liquid |
| cohesion | attraction between molecules of different substances |
| proton | positively charged part of an atom |
| electron | negatively charged part of an atom |
| neutron | part of an atom with no charge |
| nucleus | center of an atom |
| isotope | atom of an element that has a number of neutrons different from that of other atoms of the same element |
| compound | substance formed by the chemical combinations |
| covalent bond | bond formed by the sharing of electrons between atoms |
| valence shell | the outer-most electron shell |
| solute | substance that is dissolved |
| solvent | substance that dissolves |
| Hydrogen Bond | weak attraction between a hydrogen atom and another atom |
| pH scale | measurement system of hydrogen ions (H+) |
| acid | compound formed H+ ions |
| base | contains a lot of OH- ions |
| atom | basic unit of matter |
| adhesion | attraction between molecules of different substances |
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