Topic 2 - Ionic Compounds Flashcards
1
Q
what is the overall charge of an ionic compound?
A
0
2
Q
how do you work out an ionic compounds formula?
A
use the cross method, e.g:
Ca²⁺ and NO₃⁻ would make Ca(NO₃)₂
3
Q
what do ‘dot and cross’ diagrams show?
A
what happens to electrons when ionic bonding happens
4
Q
what structures do compounds with ionic bonding have?
A
giant ionic structures
5
Q
how are ions held together in giant ionic structures?
A
in a closely packed 3D lattice arrangement by the attraction between oppositely charged ions
6
Q
why do ionic compounds have high melting/bonding points?
A
strong electrostatic attraction means a lot of energy is needed to overcome them
7
Q
are ionic compounds conductors?
A
only when melted or dissolved in water
