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17 Cards in this Set
- Front
- Back
What does PERIODIC mean?
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regular, repeating pattern
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Who was Dmirti Mendeleev?
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Russian scientist who invented the Periodic Table of Elements to sort the known elements out in an orderly way.
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What is the PERIODIC LAW?
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The chemical and physical properties of elements are periodic functions of their atomic numbers.
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What is the simplest elemtent?
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Hydrogen hsa one proton and one electron with NO neutrons.
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What are the columns on the periodic table called?
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Groups have similar physical/chemical properties.
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Rows in the Periodic table are called what?
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Periods are arranged in patterns, more specifically in order from least amount of protons to most amount of protons.
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What do groups one and two contain?
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Very reactive metals easily ract with other elements in nature.
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What are the elements in group one called?
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Alkali metals are generally soft, silver-colored, shiny, and have low density.
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What are the elements in group two called?
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Alkaline-earth metals are generally silver-colored and can be used (with other elements) to make airplanes.
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What are groups 3-12 called?
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Transition metals are generally good conductors of heat and electricity, and have varying ractivity.
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What are Lanthanides and Actinides?
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the two groups placed below the Table to save roon
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Describe the boron group.
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group 13
one metalloid four metals 3 electrons in outer level reactive |
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Describe the carbon group.
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group 14
one nonmetal two metalloids two metals 4 electrons in outer level ractivity varies |
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Describe the nitrogen groups.
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group 15
two nonmetals two metalloids one metal 5 electrons in outer level reactivity varies |
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Describe the oxygen group.
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group 16
three nonmetals one metalloid one metal 6 electrons in outer level reactive |
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Describe the halogens group.
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group 17
nonmetals 7 electrons in outer level very reactive |
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What is so special about group 18? (the Noble Gasses)
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The Noble Gasses are unreactive to other elements under normal conditions.
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