where on the periodic table are the p block elements
groups 3-8
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What happens to atomic radius across a period
It decreases as electron shells remains the same but the proton number gets bigger meaning the outer electrons are more attracted to the nucleus
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What happens to 1st ionisation energy across a period
This also increases as the electron shells remains the same and proton number increases meaning more energy is needed to remove outer electrons
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Why is there a decrease in ionisation energy between phosphorus and sulphur
In sulphur there is a pair of electrons in one of the 3p orbitals meaning the electrons repel each other and it is easier to remove the outer electrons
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Why does sulphur have a higher melting point than phosphorus
more electrons so stronger and more van der waal forces
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What happens to atomic radius down a group
The atomic radius increases as the electron shells increase
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Down group 2 what happens to the melting and boiling point
The melting and boiling point decreases as the metallic bonding weakens and atomic size increases this means electrostatic attraction weakens
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What happens to the reactivity down group 2 elements
It increases
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What is given off when magnesium burns in steam
it gives off magnesium hydroxide
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How is titanium extracted
TiO2 is converted to titanium chloride. Then purified in a Ar atmosphere. titanium then extracted from magnesium
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Why is titanium expensive
Because of the magnesium,process slow,Ar atmosphere expensive,high temperature
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What happens to the group 2 hydroxides down the group
They become more soluble
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What happens to the solubility to the sulphates down group 2
They become less soluble
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Why is Barium Sulphate used in medicine
it has a low solubility meaning the toxins cannot be absorbed
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how do you test for sulphate ions
Barium chloride is acidified with hydrochloric acid as a reagent if sulphate ions present a white precipitate is formed
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How do you write ionic equations
Take full equation. separate into ions. cancel out spectator ions
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What is the trend in MP/BP down group 7
Increases, because molecules become larger, more electrons and van der waal forces, stronger intermolecular forces
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What is the trend in electronegativity down group 7
Decreases atomic radius increases due to more electron shells meaning element less able to attract electrons
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What is the trend in oxidising agents in group 7
oxidising agents decrease down the group because it is harder to gain electrons
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What colour is the liquid when potassium chloride reacts with chlorine
it goes pale green
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what colour does bromine go when it reacts with potassium bromide
yellow solution
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what colour does iodine go when it reacts with potassium iodide
brown and this is the same with potassium chloride and bromide
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what colour does chlorine go when it reacts with silver nitrate
white
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what colour does bromine go when it reacts with silver nitrate
cream
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what colour does iodine go when it reacts with silver nitrate
yellow
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why is the nitric acid used
to stop other ions interferring
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what happens to silver bromide and chloride when ammonia is added
it dissolves to form a colourless solution
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What is observed when sodium fluoride reacts with sulphuric acid
white fumes of HF are formed
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What happens when sodium chloride reacts with sulphuric acid
produces HCl fumes
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Observation of bromide ions with sulphuric acid
White steamy fumes and red fumes of bromine are formed
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observations of iodide ions with sulphuric acid
White steamy fumes of HI formed, black solid formed and purple fumes of iodine, sulphur dioxide formed
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what happens if universal indicator is added to the reaction of chlorine with water
It will turn red because of acidic products but then colourless because of the bleach
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what happens when the yellow precipitate reacts with concentrated ammonia
nothing happens
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what is disproportionation
it is where the oxidation state and reduction state change simultaneously
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Other cards in this set
Card 2
Front
Where are d block elements
Back
transition metal
Card 3
Front
where on the periodic table are the p block elements
Back
Card 4
Front
What happens to atomic radius across a period
Back
Card 5
Front
What happens to 1st ionisation energy across a period
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