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25 Cards in this Set
- Front
- Back
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Alkaline Metal
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Somewhat reactive metals in group 2
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Atom
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The smallest building block with all properties needed. Made up of a proton, neutron and electron
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Atomic Number
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The number on the top or to the left in the chemical symbol. Represents # of protons and electrons in nucleus
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Average Atomic Mass
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The average of all isotopes mixture
Use: (mass#)(%)+(mass#)(%) 100 |
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Ductile
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Ability of metals to be drawn into a wire and conduct electricity
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Electron
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Smallest property of atom. Has - charge. Weighs a 2-thousandth of amu. Surrounds nucleus
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Electron Cloud
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The area around the nucleus with electrons in it.
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Electron Dot Diagram
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A diagram showing the # of valence electrons with dots around the chemical symbol inside representing the nucleus
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Group
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The vertical columns of the periodic table. A group has the same # of valence electrons.
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Halogen
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Group 7
Contains Fluorine, Chlorine, Bromine, Iodine |
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Isotope
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Atoms of the same element that have different numbers of neutrons
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Malleable
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Ability of metals or alloys to be rolled or hammered into thin sheets
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Mass Number
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The sum of numbers of protons and neutrons in a nucleus
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Metal
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Elements found on the left side and middle of the periodic table
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Metalloid
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Elements that have some properties of metals and nonmetals
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Neutron
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Particle found in nucleus. No charge, weighs 1 amu
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Noble Gas
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Elements with full shells, they don't mix
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Nonmetals
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Elements on the right side of the periodic table
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Nucleus
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Positively charged center of an atom
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Period
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Rows in periodic table
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Periodic Table
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Table of the elements arranged according to repeated changes in properties
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Proton
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Positively charged particles in an atom
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Quark
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Smallest known property that makes up protons and neutrons
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Transition Elements
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Groups 3-12
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Valence Electrons
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Electrons on the outer shells
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