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Atom The smallest unit of matter.
What are atoms made of ? Protons, Neutrons, Electrons.
What is the mass of the particles ? Protons 1, Neutrons 1, Electrons 0.
What is the electronic charge of the particles ? Protons +1, Neutrons 0, Electrons -1.
The atoms contain equal number of ..... Protons, Electrons (so they have no overall charge) and atomic number.
How do you recognise the atomic number ? It is always the smallest of the two.
Atomic number The sum of the protons and neutrons in an atom's nucleus
Electron configuration The arrangement of electrons on the shell.
Examples of electro configuration diagrams. Plum pudding model 1904. Bohr Rutherford ( the one we use )
Isotopes Are different versions of an element which have different number of neutrons and the same number of protons.
Relative Atomic mass The average mass number of the different isotopes an element.
How is RAM calculated ? (mass number * abundance %) + ( mass number * abundance %)
Valence Shell Diagram Include all the electrons on the outer shell.
Relative Formula mass It is the average of all the masses of atoms in a compound.
Element An element is a substance whose atoms all have the same number of protons
Molecule When two of the same elements combine e.g O2
Compounds When different elements combine. H2O
Created by: Olivia250



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