Documents 20/09/2015 Structures and Bonding Heolddu Comprehensive School.

* Structures and Bonding Heolddu Comprehensive School * Periodic table Horizontal rows are called PERIODS * The Periodic Table Fact 1: Elements in the same group have the…

Documents Atomic mass

* Atomic mass * Relative formula mass, Mr The relative formula mass of a compound is the relative atomic masses of all the elements in the compound added together. E.g. water…