Chemistry Calculations 0.0 / 5 ? ScienceChemistryGCSEWJEC Created by: HannahNicCowCreated on: 11-02-18 14:38 What is the calculation for mass number protons + neutrons 1 of 9 What is the calculation for neutron number? Mass number - Atomic number 2 of 9 What is the proton number? Atomic number (bottom number) 3 of 9 What is the calculation for electron number? Electron number= proton number ( as long as there is no overall charge) 4 of 9 What method is used to balance charges? Drag and Drop e.g Mg2+ Cl- is written MgCl>2 5 of 9 What is the relative atomic mass (Ar) equal to? Mass number 6 of 9 How can you calculate RMM (Mr) Multiply the RMM by the amount of atoms of that element and add them together 7 of 9 How can you calculate the percentage composition of an element in a compound? Total relative mass of the element/RMM of the compund X 100 8 of 9 Chemistry Calculations .. 9 of 9
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