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study stack123
6th grade test
| Question | Answer |
|---|---|
| chemistry | the study of matter |
| atoms | smallest piece of of a element |
| nucleus | center of a atom |
| proton | positive part of a atom |
| atomic mass | protons+nuetrons |
| atomic theory | what scientists think about atoms |
| element | a substance that contains 1 kind of atom |
| periodic table of elements | the classification system that organizes elements based on the atomic numbers and groups then into the rows and columns based on their chemical and physical pproperties |
| Mendeleeve | invented periodic table |
| chemical symbol | abbreviation for name of element |
| molecules | atoms held together by chemical forces |
| covalent bond | a bond that occurs when atoms share pairs of electrons |
| acid | a compound that forms hydrogen ions when dissolved in water |
| base | a compound that forms hydroxide ions when dissolved in water |
| pH scale | determines the concentration of or the amount of acids and bases in a solution |
| indicators | a substance that changes color when exposed to acid or base solutions |
| neutralize | when acid and bases come in contact with another |
| salt | a compound that forms after a base and acid combine |
| atomic number | the number of protons in a nucleus (also the same as the number of electrons) |
| chemical reaction | a joining of different types of atoms to form new substances |
| compounds | a substance formed when 2 or more different elements join together chemically |
| the Bohr model | based on how atoms act, is a model of the rings of an atom |
Created by:
joshfox
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