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1. Relative Mass
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Wednesday, 1 March 2017
CHAPTER 3 : CHEMICAL FORMULA AND EQUATIONS
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FORMULA OF IONS
Ionic compounds made up of positive ions and negative ions. To write the formula of an ionic compound, we need to know the symbol and char...

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The relative molecular mass (Mr) of an element is the average mass of one molecule of the element/compound when compared with of the mass...
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Ionic compounds made up of positive ions and negative ions. To write the formula of an ionic compound, we need to know the symbol and char...
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Chemistry is the study of matter, its properties, how and why substances combine or separate to form other substances, and how substances...
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