SC7c Properties of Metals Flashcards
1
Q
properties of metals? 4
A
~shiny when polished
~good conductor of heat and electricity
~malleable/flexible
~high melting point
2
Q
structure of metals?
A
a giant lattice of positive metal ions surrounded by a ‘sea’ of delocalised electrons which move randomly in all directions
3
Q
why are metals malleable?
A
they can be hammered or rolled into shape without shattering as the layers of metal ions slide over one another whilst the ‘sea’ of delocalised electrons holds the ions together
4
Q
why do metals conduct electricity?
A
when a voltage is applied between two points on a piece of metal, the electrons flow towards the positive side. this flow of electrons transfers energy and forms an electrical current
