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Atomic Structure and the Periodic Table (Middle School)

Vocabulary related to the structure of an atom and the contents of the Periodic Table.
AB
Protonpositive
Electronnegative
Neutronneutral
Nucleuscenter
energy levelselectron cloud
group/familyvertical
periodhorizontal
Inert GasesNoble Gases
Group 1Lithium Family
HalogensFluorine Family
1st Energy Level2 electrons
2nd Energy Level8 electrons
MendeleevFirst Periodic Table
Metalsleft side of Periodic Table
Non-metalsright side of Periodic Table
Metalloidsstairstep line
matterdefined by mass and volume
atomsmallest unit of matter
alloytwo or more metals combined
Modern Periodic Tablearranged by atomic number
Malleablecan be pounded
Ductilecan be drawn into wire

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