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Periodic Table

Physical Science- Periodic Table Powerpoint 11/6/13

QuestionAnswer
Periodic Table organizational system for elements
Dimitri Mendeleev Made periodic table. 1869-organized by atomic weights
Rows left to right
columns up to down
Atomic Orbitals All the elements in a period have the same number
periods= rows; left to right
groups= columns; top to bottom every element first column (group 1) has one electron. (group 2) has two elements.
To find # of protons? Atomic Number
To find # of electrons? Atomic Number
# of Neutrons Atomic Weight - Atomic Number
What are Alkali Metals? Very reactive, does not occur freely in nature. Explode if they are exposed to water. Li, Cs, Na, Fr, Rb, k
What are Alkline Earth Metals? very reactive Be, Sr, Mg, Ba, Ca, Ra
Transition Metals ductile & malleable, and conduct electricity and heat.
Rare Earth Metals many man made
Other Metals Al, Ga, In, Sn, TI, Pb, Bi, ductile
Metalloids semi conductors B, Si, Ge, As, Sb, Te, Po
Non- metals not able to conduct electricity or heat well, brittle doesn't reflect light.
Halogen "salt former" compounds containing halogens called "salts"
Noble Gases doesn't form compounds easily
Created by: ECHS
Popular Physical Science sets

 

 



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