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Chemistry/What is Chemistry ?/What is Chemistry Definition/Chemistry Meaningwhat is chemistry the study ofChemistryHow to Balance Chemical EquationshttpsAlthough an element's atoms must all have the same number of protons, they can have different numbers of neutrons and hence different masses When atoms of the same element have different numbers of neutrons, they are called isotopes How Elements Came to be Defined Correctly In 1913, chemistry and physics were topsyturvy
