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21 Cards in this Set
- Front
- Back
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Isotope
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An atom that has an unequal amount of neutrons and protons.
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Nucleus
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The center of an atom.
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Atomic Mass Number
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The total amount of protons and neutrons in an atom.
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Atomic Number
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The number of protons in an atom.
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Electron
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A negatively charged particle in an atom.
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Proton
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A positively charged particle in an atom.
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Atomic Mass
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Number of protons in an atom.
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Groups
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The columns on the periodic table.
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Periods
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The rows on the periodic table.
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Metals
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Characteristics: The conduct electricity and heat and can be molded.
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Non-Metals
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Characteristics: Dull and brittle
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Radioactivity
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The process which the nucleus creates energy because of its lost protons.
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Half-Life
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The amount of time it takes for HALF of the radioactive substance's atoms to decay.
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Positive Ions
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An atom which transfers its atoms to another atom.
The overall charge is POSITIVE. Gave away 1 or more electrons, making the net toal positive. |
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Negative Ions
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An atom which transfers its atoms to another atom.
The overall charge is NEGATIVE. Gained 1 or more electrons, making the net total negative. |
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Element
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A substance made up of atoms.
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Symbol
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The letter(s) which represent the element.
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What are the 4 substances philosophers thought everything on Earth was made from?
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Earth, Wind, Water and Fire
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Explain Dalton's Theory
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Everything is made up of elements. If you compare the same elements, their atoms will be the same. If you compare different elements, their atoms will be different.
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Name the 8 regions of the Periodic Table
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Alkaline Metals, Alkaline Earth Metals, Transition Metals, Non-Metals, Metalloids, Other Metals, Halogens, Noble Gases, Lanthanides and Actinides.
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What are the metalloids?
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A group which share the characteristics of both the Metals and Non-Metals.`
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