Chemistry Lesson 1
Atomic and Molecular Structure (Grades 9-12)

Instruction 1-4

Lanthanide, Actinide, Transactinide, and Transuranium Elements

http://www.chemicalelements.com/groups/rareearth.html (Lanthanide, actinide)

http://en.wikipedia.org/wiki/Transactinide (Transactinide)

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