Structure of Atoms and Properties of Elements: 3
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| atom | The smallest part of an element.
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| protons | Positive subatomic particles in the nucleus of an atom.
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| neutrons | Neutral subatomic particles in the nucleus of an atom.
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| electrons | Negatively charged, and the smallest subatomic particles; found in a "cloud" around the nucleus of an atom.
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| orbitals (shells) | Area where an electron is likely to be found.
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| valence shell | The highest level orbital; the outer energy level of an atom.
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| subatomic particles | protons, nuetrons, electrons
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| valence electrons | Electrons in the outer energy level.
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| elements | Substances that cannot broken into another substance. They are made of atoms with the same number of protons.
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| atomic number | Number of protons in an atom of an element.
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| atomic mass | Number of protons and neutrons in an atom of an element.
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| amu | Atomic Mass Unit (Da)
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| Periodic Table | Arranges all known elements by atomic number and the properties of elements.
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| periods | Horizontal--- rows of the periodic table.
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| electron configuration | How many valence electrons an element has.
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| Groups (Families) | Vertical (up/down) columns on the periodic table which all have the same number of valence electrons.
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| metals | Located on the left side of the periodic table; most are solid, hard,shiny, conduct heat and electricity. Usually give up electrons.
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| nonmetals | Located on the right of the periodic table; usually gases or dull, brittle solids. Usually gain electrons.
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| metalloids | Elements on the periodic table next to the bold, staircase line. They have properties of both metals and nonmetals.
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Or sort by any of the columns using the down arrow next to any column heading.
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Created by:
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