Sulfur atom needs 2 more electrons in the outermost shell to stablize. Thus, sulfide ion will be negatively charged. The number of protons did not change but the number of electron increase by 2. . The first shell can only have two electron maximum and 4 pairs of electron for the second and third shell.

Xue Ting :D
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July 2011
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1.Kinetic Particles Theory
2.Element Mixture Compound
3.States of Matter && State Symbol
4.Methods of Purification & Separating Mixtures
5.Collecting dry gases
6.Acids Bases Salt
7.Preparation of Salts
8.Mole Calculations
9.Colour of Substances



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