Remember, compounds are a pure substance whose smallest unit is made up of atoms of two or more elements joined by chemical bonds.

There are two main types of chemical bonds, covalent bond and ionic bond. The animations below will show what happens in the different types of bonding. Click on the button that says "Bond" to start the animation.

Covalent bonding is the sharing of electrons between atoms. Covalent bonds are very strong.

Ionic bonding is when an atom gains or loses electrons. Ionic bonds are not as strong as covalent.

According to the animations above, in which energy level were the electrons that were involved in the bonding process located?

the outer energy level