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Lewis Structures (electron dot diagrams) |
| Number of Valence Electrons | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | ||
|---|---|---|---|---|---|---|---|---|---|---|
| Example | Hydrogen | Group I (Alkali metals) |
Helium | Group II (alkali earth metals) |
Group III | Group IV | Group V | Group VI | Group VII (Halogens) |
Group VIII except Helium (Noble Gases) |
| Lewis Structure (electron dot diagram) |
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| Charge on Ion | 1+ | 2+ | 3+ | 4+ | 4- | 3- | 2- | 1- | ||
|---|---|---|---|---|---|---|---|---|---|---|
| No. electrons gained or lost | 1e lost | 2e lost | 3e lost | 4e lost | 4e gained | 3e gained | 2e gained | 1e gained | ||
| Example | H+ | Group I + (Alkali metals) |
Group II 2+ (alkali earth metals) |
Group III 3+ | Group IV 4+ | Group IV 4- | Group V 3- | Group VI 2- | Group VII - (Halogens) |
H- (hydride) |
| Lewis Structure (electron dot diagram) |
OR H+ |
OR Li+ |
OR Be2+ |
OR B3+ |
OR C4+ |
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OR 


OR Li+
Li+ OR 




OR 


OR 

OR 
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