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Ions and the Periodic Table
Ions are formed when electrons are transferred from one atom to another.

Predicting Ionic Charges
You can predict the charge of an element's ion from its position on the periodic table.

You can find the number of electrons in the outer shell from the element's…

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Group Elements Ion formed
Group 1 +1
Group 2 +2
Group 6 -2
Group 7 -1


Positive ions +1 Negative ions -1
(cations) (anions)
H+ Hydrogen Fl- Fluoride
Li+ Lithium Cl- Chloride
Na+ Sodium Br- Bromide
K+ Potassium I- Iodide
Cu+ Copper l OH- Hydroxide
Ag+ Silver NO3- Nitrate V…

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