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Atomic Structure
Atomic Structure (Chem Per. 4 at THS)
| Term | Definition |
|---|---|
| atom | The smallest particle of matter that still has the properties of the element |
| proton | Positively charged subatomic particle |
| electron | Negatively charged subatomic particle, 1/2000 times less massive than a proton |
| neutron | Neutral subatomic particle, about the same size as a proton |
| nucleus | The small, dense, positively charged central core of an atom |
| Law of Conservation of Matter | Matter is neither created nor destroyed in a chemical reaction |
| atomic number | The number of protons in the nucleus of an atom |
| mass number | The sum of the protons and the neutrons in the nucleus of an atom |
| isotope | Atoms of the same element that have different numbers of neutrons |
| electromagnetic spectrum | The whole range of electromagnetic radiation, from radio waves to gamma rays |
| wavelength | The distance between two corresponding points on consecutive waves |
| frequency | The number of waves that go by in a second |
| emission spectrum | The spectrum of light released from excited atoms of an element |
| energy levels | Regions of space in which electrons can move around the nucleus of an atom and are most likely to be found |
| valence electron | The electrons in the outermost energy level of an atom |
Created by:
mtangjohnson211b
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