1
Q
what is an ion?
A
a charged particle formed when atoms gain or lose ions
2
Q
why do atoms gain or lose electrons?
A
to achieve a full outer shell, making them more stable
3
Q
what ions do metals form?
A
positive
4
Q
what ions do non metals form?
A
negative
5
Q
how can ionic bonding be shown?
A
dot and cross diagrams
6
Q
what forces bind the metal and non metal in ionic bonding?
A
electrostatic forces
7
Q
which groups are most likely to form ions?
A
1&2: positive (cations)
6&7: negative (anions)
8
Q
what structure does an ionic compound have?
A
a giant ionic lattice. there are very strong electrostatic forces of attraction in all directions
9
Q
characteristics of ionic compounds
A
- high melting and boiling points
- when solid, can’t conduct electricity
- when melted or dissolved in water, can conduct electricity
