Topic 4 Flashcards
What are the properties of non transition metals
They conduct electricity well and they are malleable which means they can be bent into different shapes. They are good for bridges
What are the properties of transition metals
They have high melting points and form colourful compounds. I.e copper sulfate is blue
Why do metals have their properties
Metals consist of a regular arrangement held together with metallic bonds. Metallic bonds give the metal a giant structure consisting of positive ions and free electrons. This creates a sea of delocalised electrons this is why they are good conductors. The giant metallic structure and strong bonds mean they have high melting points and insoluble
What are the properties of alkali metals
They re soft and have low melting points
Why do group 1 elements react vigorously in water
They react to form hydroxides. They all have an electron on the outer shell as you go further down the table the electrons become further away from the atom meaning the attraction to the nucleus grows weaker. Making it easier for the reaction forming hydroxides to take place making the reaction faster and more violent
What products are given off when an alkali metal and water is reacted
Alkali metal + water to alkali hydroxide + hydrogen
Why are group 7 elements reactive
They only need one electron to fill their outer shell
What happens when a halogen reacts with a metal
It forms a metal halide
Where are the most reactive halogens and why
Near the top of the group as the outer shell is closest meaning the attraction to new electrons is greatest
What happens if a more reactive halogen reacts with a solution of water and halide ions
It will displace the halogen , for example chlorine is more reactive than iodine, therefore chlorine reactions with potassium iodide to form potassium chloride and iodine
What do the noble gasses do
Not much they are very unreactive
What are the properties of noble gases
They are an inert colourless gas
Why are Nobel gasses so unreactive
They are in group 0 meaning they have 0 electrons in there outer shell or they have a full shell meaning they don’t need to react
What are some uses of Nobel gases
Argon is used in filament lamps , it is nonflammable so it stops the very hot filament burning away . Helium is used in airships and party balloons as its density is lower than air
What happens as you move down group 0
Group 0 is the Nobel gases as you move down the boiling point and densitys increase
