Periodic Table ¥ 186060/92 elements were known, but disagreements over average atomic masses. 1 st Int’l Congress of Chemists (1860) decided actual #’s.
Chapter 6 Periodicity. Obj. 1 …Periodic Law Elements on the periodic table (PT) are organized Elements on the periodic table (PT) are organized by their.
The Atomic Nucleus Holding it all together – or not!
Chapter 6
