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Atomic Structure

Atomic Structure (Chem Per. 4 at THS)

TermDefinition
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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