Home > Science > Additional OCR Gateway Science Topics > The Periodic Table > Ionic bonding
The Periodic Table
Ions usually have:
A full outer shell
The same number of electrons as protons
An odd number of electrons
What is the formula of the ionic compound formed by Al3+ and O2-?
Magnesium chloride has the formula MgCl2. What are the ions in magnesium chloride?
Mg2+ and Cl-
Mg+ and Cl2-
Mg2- and Cl+
Ionic compounds are held together by:
Electrostatic attraction between similarly charged ions
Gravitational attraction between oppositely charged ions
Electrostatic attraction between oppositely charged ions
Why do solid ionic compounds NOT conduct electricity?
There are no charged particles involved
There are no electrons in ionic compounds
The ions in a solid cannot move