People of Periodic Table Flashcards
1
Q
Greeks- Artistotle
A
*classified everything into 4 categories
*Earth,Wind, Fire,Water
*MAYBE classified into aether
2
Q
Greeks- Democritus
A
*described material world as tiny indivisible particles atomos (uncuttable)
3
Q
Dobreiner
A
*Organized everything into 3 groups
*Law of triads
* Element on triads all had the same properties
4
Q
Newlands
A
*Law of Octaves
* Organized all into groups of 7
*elements in rows has same properties
*table organized by increasing mass
5
Q
Mendeleev (very important)
A
*Organized by atomic weight
*Leaves space for future elements
*predicts unknown elements
6
Q
Moseley
A
*X-ray expirement
*direct relationship with wavelength and #of protons
*makes atomic numbers
*new organization of table
7
Q
Seaborg
A
*Decides to take f-block out of table
*due to the way they reacted
