10 Metals Flashcards
Properties of metals (6)
High melting and boiling points
ductile - metal can be drawn out to form thin wires of without snapping
malleable
sonorous
shiny
good conductor of electricity and heat
Why can metals conduct electricity (3)
Conducts electricity because of metallic bonding
metal atoms give up one or more of their electrons to form cations
The free electrons surround the cations and the positive and negative charges attract, holding the structure together
Define metallic bonding
Strong attraction between the closely packed cations and a sea of delocalised electrons
Why are metals ductile and malleable (3)
Layers of ions are able to slide over each other
Metallic bonds between positive cations and negative anions not too strong
Hence, ions can be hammered out into different shapes
Define alloy
A mixture of a metal with one or more elements
Why are alloys used over pure metals
Alloys have more desireable properties than pure metals
Metal + water —-> ?
metal + water ——> metal hydroxide + hydrogen
Group 1 reaction with water
Most reactive
Potassium - lilac flame produced with lots of hydrogen gas produced
Sodium - fizzes around the water and giving off hydrogen gas
Lithium - bubbles of hydrogen gas given off
Least reactive
Reactivity Series
Potassium
Sodium
Calcium
Magnesium
Aluminium
(Carbon)
Zinc
Iron
(Hydrogen)
Copper
