Key definition 'An ionic bond is the electrostatic attraction between oppositely charged ions Ionic bonding Ionic bonding occurs between a metal and a non-metal For example, Magnesium oxide, MgO It happens when electrons are transferred from one atom to another, creating oppositely charged ions, which are bonded together by electrostatic attraction For example sodium oxide, Na2O Each sodium atom has lost 2 electrons to obtain the electronic configuaration of neon:
2Na -----> 2Na+ + 2e- Each oxygen atom has gained two electrons to acheive the electronic configuration of Neon also:
2 e- + o -----> o 2- Giant ionic lattice: a 3d structure of oppsoitely charged ions, held together by strong ionic bonds when an element loses an electron it becomes positive, when it gains an electron it becomes negative. How many electron it gaisn or loses depends on where it comes in the periodic table Ionic compunds that need to be learnt Ammonium 1+, NH4 Hydroxide 1-, OH- Nitrate 1-, No3- Nitrite 1- No2- Hydrogencarbonate 1-, HCO3- Carbonate 2-, CO3 2- Sulphate 2-, So4 2- Sulphite: so3 2- Dichromate, Cr2o7 2- Phosphate, PO4 3-
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Ionic bonding
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