metallic bonding and metals Flashcards
how are the atoms within a molecule held together
very strong covelent bond
what makes a boiling point/melting point low
when the molecules are easilly seperated
why do covenalnt structures have hight boiling points
beacuse the covalent bonds are so strong it takes alot of energy to break the forces between the atoms
what cuases a material to conduct electricty
when electrons or ions move
what are ionic compounds made of
a lattice of negativly and posativly charded ions
why dont solid ionic coumpounds not conduct electricity
because the ions arent able to move
how are metals held together
metallic bonding
what is the stucture of metals
a giant structure of posotive ions surrounded by a sea of de localised electrons
what is metalic bonding
the elctrostatic attractions between the nuclei of the posotive ions and the electrons
why are metals good conductors of electricity and heat
because the de localaises electrons are able to move through the strcture.
how metals and non metals bond
ionic bonding
how to non metals and non metals bond
covalent bonding
how to metals bond to other matals
metallic bonding
explain metallic bonding
when atoms are together in a metal they all give up there outer shell electrons to shair them with the other atoms in the metal. This means that the atoms will all become postaive ions as they have lost negative electrons. The electrons are now free to move about and we call that de localised electrons. There is now electrostatic attractions between the posative ions and the negative electrons.