metallic bonding and alloys Flashcards
what do metals consist of?
giant structure of atoms arranged in regular layers
are the outer electrons of a metal attached to any atom?
no, this means they are free to move, and are called delocalised electrons - often called a sea of delocalised electrons
due to the sea of delocalised electrons in a metal atom, there is
a strong electrostatic attraction between the sea of delocalised negative electrons and the positive metal ions
the electrostatic attraction in metal are called metallic bond
what do the strong metallic bonds mean for metals melting and boiling point?
it means they have a high melting and boiling point, as a great deal of energy would be needed to break the metallic bond
why are metals good conductors of heat and electricity
because the delocalised electrons can move
why can metals be bent and shaped
because the layers of atoms can slide over each other
what is an alloy
a mixture of metals
the different sizes of metals distorts the layers making it harder for them to slide over each other, meaning alloys are harder then pure metals
