Chemistry Flash cards 0.0 / 5 ? ChemistryCalculationsASEdexcel Created by: omarfuCreated on: 28-11-14 09:45 Relative atomic mass The relative atomic mass of an element is the average mass of the element's isotopes relative to one-twelfth of the mass of a carbon-12 atom. 1 of 5 Isotopes Isotopes are atom of the same atom with different number of neutrons, therefore they have different mass number 2 of 5 Atomic Number Z The atomic number is the number of protons in an atom 3 of 5 Mass Number A The atomic number of atom is the sum of protons and neutrons in the atom 4 of 5 Empirical Formula The empirical formula of a compound shows the simplest atom ratio of the elements in that compound. 5 of 5
Key points for OCR AS chemistry Unit 2 (ideal for flash cards, podcasts or just general reviewing) (1) 0.0 / 5
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