Science - Metals Unit Flashcards
List me 5 metals and their uses
Any 5 from the following: Gold Jewerly Ornaments Copper Construction of water pipes/electrical wires Silver Cooking Utensils Aluminium Bodies of trains or planes or sheet foil Steel Bridges/Large Buildings Iron To make steel Mercury Liquid metal for planes Sodium Trains/cars Potassium Bells/Gong Arsenic Coins Antimony Iron nails Bismuth Machines Lead Buildings/Bridges Magnesium Light weight for pipes Lithium Low density and can be used for batteries Osmium Fountain tip pens
Define Flexible
can be stretched and hammered into shapes
What is a shiny metal used for?
use for jewerly, ornaments or decorations
What can a good conductor of heat be used for?
iron for clothes, cooking utensils
What can a good conductor of electricity be used for
Wiring
What can a strong metal be used for?
used for machinery, building material, chains
What metals are magnetic?
only iron and iron alloys (mixture of metals)
On the periodic table what is on the left, on the right and in between
On the periodic table metals are on the left, non-metals on the right and metalloids
between.
Metals react with ______, ______ and other non-metals to form a single compound.
Metals react with oxygen, halogens and other non-metals to form a single compound.
Lithium + oxygen –> ?
Lithium + oxygen –> Lithium oxide
What is corrosion and what does it do?
Any reaction of oxygen at the surface of a metal and It forms a layer on the surface of the metal
What is corrosion for?
For the layer to act as protection against more corrosion of the metal
What metals can rust?
Only iron and steel can rust
What 2 things are required for a metal to rust?
Rusting requires oxygen and water
What does corrosion do to affect a metal
Rust flakes off and makes the metal weaker
Suggest 3 ways you could prevent rust
Paint the metal Oil the metal Cover it with a layer of powder Keep air and water away Cover it with a thin layer of plastic Cover it with a thin layer of another metal
What is the word equation for rusting?
Iron + oxygen + water –> iron hydroxide
What type of metals are very reactive with water?
Alkali metals are very reactive with water (lithium, potassium, sodium)
What type of metals react slowly with water
Earth-alkali metals react slowly with water (magnesium, calcium)
What type of metals mostly do not react with cold water
Transition metals mostly do not react with cold water (iron, zinc, aluminum)
The reaction of a metal with acids gets ______ the more reactive it is
The reaction of a metal with acids gets faster the more reactive it is
What is the lab test for hydrogen?
A burning wooden splint goes pop if it is put into a test tube of hydrogen. This is because the flame ignites the hydrogen, which burns explosively to make a loud sound.
Sulfuric acid forms ______
Sulfuric acid forms sulfates
Hydrochloric acid forms _________
Hydrochloric acid forms chlorides
Nitric acid forms ______
Nitric acid forms nitrates
Magnesium + nitric acid =
Sodium + Sulphur =
Aluminium + hydrochloric acid =
Magnesium + nitric acid = Magnesium nitrate
Sodium + Sulphur = Sodium sulphate
Aluminium + hydrochloric acid = Aluminium chloride
