AQA Jun 2014 Paper 1 Q1 (with explained solutions) |

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AQA Jun 2014 Paper 1 Q1

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section a answer all questions in the spaces provided do not write outside the box a table shows some data about fundamental particles in an atom table particle proton neutron electron mass g a i an atom of hydrogen can be represented as h use data from table to calculate the mass of this hydrogen atom mark a ii which one of the following is a fundamental particle that would not be deflected by an electric field a electron b neutron c proton write the correct letter a b or c in the box mark wmp jun chem do not write outside the box b a naturally occurring sample of the element boron has a relative atomic mass of in this sample boron exists as two isotopes b and b b i calculate the percentage abundance of b in this naturally occurring sample of boron marks b ii state in terms of fundamental particles why the isotopes b and b have similar chemical reactions mark c complete table by suggesting a value for the third ionisation energy of boron mark table first second third fourth fifth ionisation energy kj mol d write an equation to show the process that occurs when the second ionisation energy of boron is measured include state symbols in your equation mark e explain why the second ionisation energy of boron is higher than the first ionisation energy of boron mark turn over wmp jun chem do not write outside the box when heated iron iii nitrate mr is converted into iron iii oxide nitrogen dioxide and oxygen fe no s fe o s no g o g a g sample of iron iii nitrate was completely converted into the products shown a i calculate the amount in moles of iron iii nitrate in the g sample give your answer to significant figures mark a ii calculate the amount in moles of oxygen gas produced in this reaction mark a iii calculate the volume in m of nitrogen dioxide gas at c and kpa produced from g of iron iii nitrate the gas constant is r j k mol if you have been unable to obtain an answer to question a i you may assume the number of moles of iron iii nitrate is this is not the correct answer marks wmp jun chem

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mark scheme a level chemistry chem june marking guidance mark comments only not g allow idea that there are divisions between and correct answer scores m and m ignore electrons determine chemical properties ignore protons unless wrong of question a i g kg a ii b x y b i x y or ratio or etc abundance of b is or x x x x x same number of electrons in outer shell or orbital same electronic configuration arrangement b ii range between and kj mol b g b g e b g e b g b g e b g e electron being removed from a positive ion therefore need more energy electron being removed is closer to the nucleus c d e mark scheme a level chemistry chem june ignore state symbol on electron even if wrong must imply removal of an electron allow electron removed from a particle species or from a ion not electron removed from a higher lower energy level shell not electron removed from a higher energy sub level orbital ignore electron removed from a lower energy sub level orbital ignore more protons than electrons not greater nuclear charge ignore greater effective nuclear charge ignore shielding of

Question 1 2 3 4 5 6 7

Topics to revise

AQA > Physical chemistry > Atomic structure AS >

1 Subatomic Particles and Isotopes

AQA > Inorganic chemistry > Periodicity AS >

1 Periodicity

AQA > Physical chemistry > Atomic structure AS >

4 Electronic arrangement

AQA > Physical chemistry > Amount of substance AS >

1 The mole and Avogadro’s constant

AQA > Physical chemistry > Thermodynamics >

5 Gibb’s Free Energy

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