This blog will cover and explain the specification for Edexcel triple science course 2013 Chemistry. Hope it helps :)
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(the same number of neutrons)/ not electrons
hi in the relative atomic mass one, do you have to mention something about in relation to carbon 12?
the way we learnt it was: the weighted mean mass of an atom of an element, relative to one twelfth of the mass of an atom of carbon-12. That got me all the marks in the exams
Ram is the average weighted mass between all the isotopes of an element
Mass number is the number of protons and neutrons in an atom, and it tells us about the mass of the atom in amu, or atomic mass units. Atomic mass is the average mass of all the isotopes of a certain type. It is a weighted average that takes into account the abundances of all of the different isotopes.
AN ISOTOPE IS AN ATOM WITH THE SAME NUMBER OF PROTONS OR DIFFERENT NUMBER OF NEUTRONS
The Chemistry Syllabus has changed…Here is a New blog for the 2017 Syllabus: https://igcse-chemistry-2017.blogspot.hk/
Very good for quick revision