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28 Cards in this Set
- Front
- Back
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What scientist was the first to develop a classification system for the elements?
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Johan Dobereiner
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What did Dobereiner call the elements he grouped with similar properties into threes?
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Triads
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What scientist was the first to create an organizational scheme for the elements?
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John Newlands
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Describe the Law of Octaves.
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Elements are arranged in order of increasing atomic mass and properties repeat at every 8th element
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What scientist published the first periodic table?
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Dmitri Mendeleev
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What scientist gave us the modern periodic table?
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Henry Moseley
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Describe Moseleys periodic law.
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When elements arranged by increasing atomic number, there is a periodic repetition of their physical and chemical properties
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The blocks on the periodic table are arranged into a series of...
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Groups/Families
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Horizontal rows on the periodic table are...
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Periods
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Elements in all A groups are...
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Representative electrons
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What are B group elements called?
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Transition elements
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What are the 4 classifications of elements?
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Metals, Nonmetals, Transition metals, and Metalloids
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Group IA?
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Alkali metals
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Group IIA?
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Alkaline earth metals
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Groups IB to VIIIB?
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Transition metals
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Group VIIA?
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Halogens
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Group VIIIA?
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Noble gases
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Group IIIA?
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Boron family
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Group IVA?
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Carbon family
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Group VA?
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Nitrogen family
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Group VIA?
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Oxygen family
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Name 6 alkali metals
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Lithium (Li)
Sodium (Na) Potassium (K) Rubidium (Rb) Cesium (Cs) Francium (Fr) |
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Name 5 alkaline earth metals
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Beryllium (Be)
Magnesium (Mg) Calcium (Ca) Strontium (Sr) Barium (Ba) |
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Name 5 transition metals
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Titanium (Ti)
Chromium (Cr) Manganese (Mn) Iron (Fe) Cobalt (Co) |
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How do you find period numbers in electron configurations?
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Number in front of sublevel
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How do you find group numbers in electron configurations?
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Add up all exponents associated with the highest energy level
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How do find the block in an electron configuration?
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Last sub level in the configuration
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What is a periodic trend?
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Predictable change as you move across a period or down a group
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