Topic 4 - Metals In The Periodic Table Flashcards
Most metals are what type of metal?
Transition metal
Two properties of metals and give examples of each
Malleable - bridges and car bodies
Good conductors of electricity - electrical wires
Properties of transition metals
High melting points
Form colourful compounds
What gives the properties to an element?
Their structure of atoms in the metal
How are atoms held together?
Metallic bonds
What does metallic bonding give the metal?
A giant structure consisting of positive ions and free electrons
Why do the electrons move more freely in a metal?
Metallic bonds allow the outer electron(s) of each atom to become delocalised (move more freely)
Why are metals good conductors of electricity
Because the electrons move freely through the structure
Describe alkali metals
Soft
Low melting points
How do alkali metals react with water?
React vigorously to form HYDROXIDES
The elements in group 1 get more reactive as the…
Atomic number INCREASES
What is chlorine like a room temperature?
Fairly reactive, poisonous, dense-green gas
What is bromine like at room temperature?
Dense, poisonous, orange liquid
What is iodine like at room temperature?
Dark grey crystalline solid
Halogens react with metals to form what?
Metal halides
Halogens can react with hydrogen to form what…
Hydrogen halides
Properties of noble gases
Inert, colourless gases
What does inert mean?
Don’t react much or at all
What makes a metal inert?
When they have a full outer shell which means they are NOT desperate to give up or gain electrons
An experiment to discover noble gases?
Fractional distillation of air
Everyday uses of noble gases?
- Argon = provides an inert atmosphere = in filament lamps (light bulbs) because it is non-flammable
- argon = metals that are being welded = inert atmosphere stops hot metal reacting with oxygen
- Helium = airships
- Helium = party balloons = helium has lower density then air which makes them foat
Boiling points and densities of noble gases:
Increase as you go down the group
