metals

What happens in metallic bonding

metals loose their outer shell electrons to form positive ions

Where do the delocalised electrons go in metallic bonding

They surround the metal ions and create a ‘sea of electrons’

What happens to the metal ions in metallic bonding

they form neat and regular patterns

Why do the electrons not leave the metal ions

there is electrostatic attraction between the positive ions and delocalised electrons

Why are metals good conductors

because the delocalised electrons can carry an electrical current around the structure

Why do metals have high melting and boiling points

The strong electrostatic forces of attraction between positive metal ions and delocalised electrons require a lot of energy to overcome

Why are metals malleable

because the positive ions are arranged in neat layers which can slide over eachother

Metals are ________ (starts with d)

Metals are DENSE

metals aren’t very strong because ……

they are malleable so they move a lot

What is an alloy

a mix of 2 or more metals

What happens if an alloy is formed

the regular arrangement is disrupted and not regular

Why aren’t alloys malleable

because the mix of smaller and larger atoms mean there isn’t a regular pattern and the layers can’t slide over each other (this is why alloys are harder than pure metals)

Why are alloys created

because sometimes pure metals don’t have the property needed (e.g. hard, strong, ect)

What are steels

alloys made mainly of iron

What are some properties of magnalium (5%)

• made from aluminium and magnesium

• stronger

• lighter

• more resistant to corrosion

• used in cars and airplanes

what are some properties of magnailum (50%)

• very reactive

• burns brightly

• used in fireworks