AQA A Level Study guides, Class notes & Summaries

AQA A-level HISTORY 7042/2S Component 2S The Making of Modern Britain, 1951– 2007 Version: 1.0 Final IB/M/Jun23/E5 7042/2S A-level HISTORY Component 2S The Making of Modern Britain, 1951–2007 Friday 9 June 2023 Afternoon Time allowed: 2 hours 30 minutes Materials For this paper you must have: • an AQA 16-page answer book. Instructions • Use black ink or black ball-point pen. • Write the information required on the front of your answer book. The Paper Reference is 704...

AQA A-level GEOGRAPHY 7037/2 Paper 2 Human geography Version: 1.0 Final A-level GEOGRAPHY Paper 2 Human Geography Insert This insert contains:  Figures 1a and 1b for use with Question 1  Figures 2a and 2b for use with Question 1  Figures 4a and 4b for use with Question 2  Figure 5 for use with Question 3  Figures 6a and 6b for use with Question 3  Figure 7 for use with Question 4  Figures 9a and 9b for use with Question 5  Figures 10a and 10b for use wit...

Relative atomic mass : The average mass of an atom of an element, relative to 1/12th of the mass of an atom of Carbon-12 Relative molecular mass : Average mass of a molecule compared to 1/12th of the mass of a carbon-12 atom The Avogradro constant : the number of particles in a mole ideal gas equation : pV = nRT empirical formula : the simplest whole number ratio of atoms of each element in a compound 2 percentage atom economy : (Mass of desired product/total mass of reactants) x 1...

s block : The block that belongs to hydrogen and groups 1 and 2 Elements that have their highest energy e- in s-orbitals E.G. Na 1s1 2s2 2p6 3s1 p : The block that belongs to the non-metals and metalloids Elements that have their highest energy e- in p-orbitals E.G. C 1s1 2s2 2p2 d : Transition metals and b-block are not exactly the same (Scandium and Zinc are not transition metals) Elements that have their highest energy e- in d-orbitals 1s1 2s2 2p6 3s2 3p6 4s2 3d6 2 f : The blo...

Colour of MnO4- (+7 oxidation state) : purple Colour of CrO7 2- (+6 oxidation state) : orange Colour of V(O2)+ (+5 oxidation state) : yellow Colour of VO 2+ (+4 oxidation state) : blue Colour of V 3+ (+3 oxidation state) : green 2 Colour of Cr 3+ (+3 oxidation state) : green/violet Colour of Fe 3+ (+3 oxidation state) : yellow

Relative atomic mass (Ar) : Average mass of an atom compared with one twelth of the mass of an atom of carbon 12 Electronegativity : Power of an atom to attract the pair of electrons in a covalent bond Standard enthalpy of combustion : Enthalpy change when 1 mole of a substance burns completely in oxygen under standard conditions with all reactants and products being in their standard state Standard enthalpy of formation : Enthalpy change when 1 mole of a compound is formed from it's...

measuring e.m.f. of electrochemical cells : The standard cell potential is the e.m.f. between two half cells making up the cell, measured under standard conditions. clean piece of each metal, e.g. copper and zinc. degrease using propanone, place copper in a beaker with around 50cm₃ 1moldm⁻³ copper sulfate solution, place zinc in a seperate beaker of same concentration and volume zinc sulfate solution join the two beakers with filter paper coated in NaCl/potassium nitrate - acts as a...

State the electron rules : Lowest energy filled first (3d>4s) Line up parallel Single until forced to pair Electronegativity : The ability of an atom to attract electrons within a covalent bond RAM (relative atomic mass) : Average mass of one atom compared to 1/12th the mass of a c-12 atom - Ionisation energy : The energy required to remove one mole of electrons from each of one mole of gaseous atoms to form one mole of positive gaseous ions 2 (Endothermic) Trends of Ionisat...

Give the full electron configuration of an Al atom and a Cr3+ ion : 1s2 2s2 2p6 3s2 3p1 1s 2s2 2p6 3s2 3p6 3d6 Deduce the formula of the ion that has a charge 2+ with the same electron : Sr2+ Deduce the formula of the compound that contains 2+ ions and 3- ions that both have the same electron configuration as argon : CaP Deduce which of Na+ and Mg2+ is the smaller ion 2 marks : Mg 2+ 2 Both have the same number of shielding however Mg2+ has more protons so higher nuclear charge and...

Describe the plum pudding model of the atom : A ball of positive charge with randomly embedded negatively charged electrons in it. Atom contains electrons, protons and neutrons. Write the three particles in order : ron n on Predict outer shells of tennessine : Number of outer shells: 7 Reason: it is in group 7 Why tennessine was not accepted as a new element by other scientists until 2015 : Time needed for peer review 2 Plan a method to obtain pure dry crystals of zinc chloride from ...

Superconductivity - ANSWER Superconductivity means that a material has zero resistivity/resistance. Resistance of the material decreases proportional to temperature, it becomes superconducting once under a critical transition temperature. Describe interaction that is responsible for keeping protons and neutrons together in a stable nucleus - ANSWER The strong interaction has a short range. It is attractive up to 5fm and repulsive from around below 0.5fm. The force is negligible for distances ...