Metalic Bonding Flashcards
What is metalic bonding?
•The electrons in the outer shell of metals are delocalised
•There are strong forces of electrostatic attraction between the positive metal ions and the shared negative electrons.
•these forces of attraction hold the atoms together in a regular structure and are known as metalic bonding
•Metalic bonding is very strong
Why are metals malleable and ductile?
They have layers of ions that can slip over eachother
What does ductile mean?
Something can be shaped into a wire
What does malleable mean?
Something is able to be hammered or pressed into shape
Why are metals good conductors of heat and electricity?
They have delocalised electrons that can carry electric charge and thermal energy through the whole structure.
What are alloys often used more than pure metals?
-this is a mixture of two or more metals or a metal and another element
-when another element is mixed with pure metal the new metal atoms will distort the layers of metal atoms making it harder for them to slide over eachother
-This means alloys are harder than pure metals
Why do melting and boiling points generally increase as you go across periods?
As you go across periods, the strength of metalic bonds in metals increase as they are losing more electrons so the ions have a higher charge.
Why do the melting and boiling points of metals generally decrease as you go down the groups?
As you go down the groups, the delocalised electrons are further away from the nucleas so they are. less attracted to it
