Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Unit 3 6th Grade
Elements, Compounds, and Reactions
| Term | Definition |
|---|---|
| electron | a particle with a negative electrical charge |
| nucleus | the center of an atom which contains most of the atom's mass |
| proton | a positively charged particle inside an atom's nucleus |
| neutron | a particle that is found in the nucleus of an atom and has no electrical charge |
| electron cloud | an area where electrons arranged in energy levels travel around an atom's nucleus |
| element | a pure substance that cannot be broken down into a simpler substance |
| atomic number | the number of protons in an atom of an element |
| isotope | one of two or more atoms of an element having the same number of protons but a different number of neutrons |
| average atomic mass | the average mass of the atoms of an element |
| periodic table | a chart that shows the elements in order of increasing atomic number |
| compound | a substance formed by the chemical combination of two or more elements |
| ion | an atom that is positively or negatively charged because it has gained or lost electrons |
| ionic bond | an attraction that holds oppositely charged ions close together |
| covalent bond | a chemical bond that forms when atoms share electrons |
| exothermic reaction | a chemical reaction that releases energy |
| endothermic reaction | a chemical reaction that absorbs energy |
| rate of reaction | the measure of hos fast a chemical reaction occurs |
| catalyst | a substance that speeds up a chemical reaction but is not used up itself or permanently changed |
Created by:
SSmith01
Popular Physical Science sets