Bonding And Properties Of Materials Flashcards
How can atoms achieve a stable electron arrangement
Gain or lose electrons
Covalent bond is …
A shared pair of electrons between atoms of two non metal elements
A covalent bond happens when the positive nuclei from two different atoms are held together by their common attraction for the shared pair of electrons held between them
Ionic bond is …
The electrostatic force of attraction between a positively charged metal ion and a negatively charged non metal ion
Properties of ionic lattice
High mpts bpts
Solid state at room temp
Conducts only when molten or in solution
Strong bonds
Properties of covalent network
Very high mtps bpts
Solid state at room temp
Never conducts, except graphite
Strong
Properties discrete covalent molecular structure
Low mpts bpts
Liquid or gas at room temp
Never conduct
Strong covalent bonds within the molecules but weak between the molecules
Properties metallic bonds
Strong
Good conductors
High mpts bpts
Solid
Metallic bond is …
The electrostatic force of attraction between positive metal ions and delocalised electrons
