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