Yes, and when they are it will result in a massive release of energy. That is what's happening in nuclear fission and atomic bombs.
ionic bonds
Ionic solids are brittle and hard as they are bonded with electrostatic bonds.
Disassociation
The answer is no. If you are comparing them with covalent or metallic bonds, then covalent is the strongest in general. There are, obviously, exceptions, but in general ionic bonds are easier to break than covalent bonds.
Ionic bonds are far stronger than hydrogen bonds. Ice is held together by hydrogen bonds, and table salt, which is sodium chloride (NaCl), is held together by ionic bonds. You can hammer on ice and break the hydrogen bonds holding it together with relative ease. But you can hammer all day on salt, turn it to a white powder, and not break the sodium-chlorine bonds (those ionic bonds) in any molecules of salt by doing so.
ionic bonds
Ionic solids are brittle and hard as they are bonded with electrostatic bonds.
Disassociation
yes
The answer is no. If you are comparing them with covalent or metallic bonds, then covalent is the strongest in general. There are, obviously, exceptions, but in general ionic bonds are easier to break than covalent bonds.
Ionic bonds are far stronger than hydrogen bonds. Ice is held together by hydrogen bonds, and table salt, which is sodium chloride (NaCl), is held together by ionic bonds. You can hammer on ice and break the hydrogen bonds holding it together with relative ease. But you can hammer all day on salt, turn it to a white powder, and not break the sodium-chlorine bonds (those ionic bonds) in any molecules of salt by doing so.
Yes, Fe is Ionic. It is hard and has a very high melting point, as well as it can conduct electricity.
The ionic elements are thus, as in the salt example here.NaClNa +=======A cation.Cl -======An anion
They are hard because the positive and negative charged ions attract eachother. It takes a lot of energy to break these charges apart.
Ionic bonds are stronger than covalent bonds and therefore require more energy to break.
Sodium chloride has a high melting point for a few reasons. Sodium chloride is held together by ionic bonds, and ionic bonds are very strong (as compared to covalent bonds, which are relatively weak). The higher the bonding strength, the more heat it will take to break those bonds to create a liquid. Thus, sodium chloride has a high melting point because of the strong ionic bonds it has.
yes. This is due to the attractions between the positive and negative ions. That is why ionic compounds have high boiling and tend to be more brittle than materials containing only covalently bonded atoms.