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chem i shall a+
history of atomic theiry. PT sections and group names
Question | Answer |
---|---|
Daltons therory | 1803 atoms but no structure |
thomson therory | 1880 discovered electrons and said they had no order...cookie chips |
rutherford therory | 1911 discovered nucleus |
bohr therory | 1920 planetry modle |
oxygen family/ group 16 | 4 below oxygen |
noble gas | farthest collum under 0 |
carbon group | 4 under carbon |
alkali metals | far left but not hydrogen |
alkaline earth metals | colleum next to alkali metals |
boron family | 4 under boron |
nitrogen family | 4 under nitrogen |
fluorine family | 4 under fluorine |
Transitioning metals | middle and below |
1 base of centi | 100 |
1 base of milli | 1000 |
1 k base | 1000 base |
100cm | 1m |
1000mm | 1m |
1000m | 1km |
100cs | 1s |
1000ms | 1s |
1000s | 1ks |
isotope | atoms of same element having different numbers |