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- 1. Multiple Choice_______________________ _______________________ discovered a pattern to the elements in 1869.MendeleevDemocritusMoseleyRutherford
- 2. Multiple ChoiceWhat are the three properties the elements were organized by originally?Metals, nonmetals, metalloidsincreasing atomic massatomic numberdensity, appearance, and melting point
- 3. Multiple ChoiceAfter playing chemical solitaire, the elements were eventually organized by atomic _____.massnumber
- 4. Multiple ChoiceIn 1914, which scientist determined the number of protons in an atom?MoseleyDemocritusThomsonMendeleev
- 5. Multiple ChoiceMoseley eventually rearranged the periodic table by ______ _______, instead of by atomic mass.atomic massatomic numbermass numberchemical symbol
- 6. Multiple ChoiceElements are classified according to their properties as __________, __________ and __________.density, appearance, and melting pointmetals, nonmetals, and metalloids
- 7. Multiple ChoiceA ______________ is each horizontal row of elements (from left to right) on the periodic table.groupperiodperiodic lawmetalloid
- 8. Multiple ChoiceEach vertical column of elements (from top to bottom) on the periodic table is ________.GroupPeriodPeriodic LawMetalloid
- 9. Multiple ChoiceThe ____ law says repeating chemical/physical properties change w/ the elements’ atomic numbersPeriodicPeriodGroupMetal
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