© OCR 2016. The periodic table is an essential tool for all chemists. It is full of useful information. RELATIVE ATOMIC MASS ATOMIC NUMBER SYMBOL helium.

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© OCR 2016

The periodic table is an essential tool for all chemists. It is full of useful information. RELATIVE ATOMIC MASS ATOMIC NUMBER SYMBOL helium NAME

© OCR 2016 MASS NUMBER ATOMIC NUMBER SYMBOL

© OCR 2016 There are 3 sub atomic particles ATOMIC NUMBER SYMBOL MASS NUMBER

© OCR 2016

There are 3 sub atomic particles Protons The number is found on the periodic table They have a charge Neutrons The number is calculated from the numbers on the periodic table They are found in the same location as another particle Electrons They are always equal in number to another type of particle They have no fixed location ATOMIC NUMBER SYMBOL MASS NUMBER