C2 - Ionic Compounds Flashcards
Describe the structure of ironic compounds
Ionic compounds always have giant ionic lattices
The ions form a closely packed regular lattice arrangement
There are very strong electrostatic forces of attraction between oppositely charged ions in all directions
Describe ionic bonding
Atoms on the left side of the periodic table lose the electrons in their outer shell so that they have a full outer shell (they now have more protons than electrons so they have a +ve charge)
Atoms on the right side gain the electrons that the other atoms lost in order to get a full outer shell (they have a -ve charge because they now have more electrons than protons)
The opposite charges of the 2 ions hold them together as a compound
What are the 4 main properties of ionic compounds?
High melting and boiling points due to the strong force of attraction
They dissolve easily in water
Melting ionic compounds or putting them into solution lets the ions freely move so they can conduct electricity
How do you calculate the reaction for an ionic compound?
Look at the charge of the positive ion and look at the charge of the negative ion
Calculate how many of each ion is needed to get an overall charge of 0
The number of ions will be the subscripts in the ionic compound
How do you show ions by drawing their electronic structure?
Draw the electronic structures of the original atoms
Get rid of lost electrons and add gained electrons to the drawings
Put square brackets around each drawing and put the charge after the brackets of each ion
What can ionic bonds form between?
Only metals and non-metals
