Metallurgy Flashcards
Why are metals ductile and malleable
Metal is malleable because there is space between the atoms so when it is hit the atoms rearrange and come closer (also making it stronger)
The same with metal being ductile except this is when the metal is drawn/pulled so it forms a wire
What are the common physical properties of metals
Malleable Lustrous Electrical conductivity Thermal conductivity Ductility
Why are metals good conductors of both heat and electricity?
Metal is a conductor of electricity because it’s atoms have free moving electrons allowing them to carry a current
It conducts heat because of the proximity between atoms means that when one is heated it begins to move and crash into others causing them to heat up and move conducting heat
How do properties of metals make them useful in society
Tungsten can withstand high temperatures making it useful in light bulbs
Copper is flexible, really good at conducting heat and electricity, very ductile making it perfect for electrical wires
Write a word equation for a metal and acid reaction
Metal + acid = metal salt + hydrogen
Magnesium + sulfuric acid = magnesium sulfate + hydrogen
Sulfuric acid - sulfate salts
Hydrochloric acid - chloride salts
Nitric acid - nitrate salts
Write a word equation for a metal and oxygen reaction
Metal + oxygen = metal oxide
Zinc + oxygen = zinc oxide
What is rust? What substances are needed for iron to rust?
Rust is the corrosion of iron, iron needs to be in the presence of both water and oxygen to rust.
How can you prevent iron rusting?
To prevent iron from rusting you can coat it in paint or you can galvanise it with zinc because zinc loses electrons and undergoes oxidation in preference to iron, in turn protecting the iron
What does the reactivity series tell you about the reactivity of metals
If a metal is able to form an ion easier it is more reactive and higher in the reaction series like sodium. If a metal is low on the reaction series (like gold) it is harder for it to form an ion making it less reactive.
