AQA Jan 2010 Paper 1 Q1 (with explained solutions) |

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AQA Jan 2010 Paper 1 Q1

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section a answer all questions in the spaces provided pmt areas outside the box will not be scanned for marking ionisation energies provide evidence for the arrangement of electrons in atoms a complete the electron configuration of the mg ion s mark b i state the meaning of the term first ionisation energy marks b ii write an equation including state symbols to show the reaction that occurs when the second ionisation energy of magnesium is measured b mark iii explain why the second ionisation energy of magnesium is greater than the first ionisation energy of magnesium mark b iv use your understanding of electron arrangement to complete the table by suggesting a value for the third ionisation energy of magnesium ionisation energies of magnesium kjmol first second third fourth fifth mark wmp jan chem pmt areas outside the box will not be scanned for marking c state and explain the general trend in the first ionisation energies of the period elements sodium to chlorine trend explanation marks extra space d state how the element sulfur deviates from the general trend in first ionisation energies across period explain your answer how sulfur deviates from the trend explanation marks extra space e a general trend exists in the first ionisation energies of the period elements lithium to fluorine identify one element which deviates from this general trend mark turn over wmp jan chem

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question part sub part a marking guidance s p s b i energy enthalpy needed to remove one mole of electrons from one mole of atoms compounds molecules elements or energy to form one mole of positive ions from one mole of atoms or energy enthalpy to remove one electron from one atom in the gaseous state to form mol of gaseous ions b b b c ii mg g cid mg g e mg g e cid mg g e mg g e cid mg g iii electron being removed from a positive ion therefore need more energy electron being removed is closer to the nucleus mg smaller than mg mg more positive than mg iv range from to kj mol increase bigger nuclear charge from na to cl more protons electron taken from same sub shell similar or same shielding electron closer to the nucleus smaller atomic radius chemistry aqa gce mark scheme january series mark comments py s s can be rewritten allow s px pz allow subscripts and capitals energy given out loses m m is dependent on a reasonable attempt at m energy needed for this change x g cid x g e marks this equation alone scores one mark do not penalise mg not equation with x allow from a particle species not electron from a higher energy level or higher sub level more protons if decrease ce if blank mark on qwc if no shielding smaller ionic radius d lower two pair of electrons in p orbital or implied repel each other e boron b or oxygen o o chemistry aqa gce mark scheme january series if not lower ce if blank mark on allow does not increase not p m dependent upon a reasonable attempt at m

Question 1 2 3 4 5 6

Topics to revise

AQA > Inorganic chemistry > Periodicity AS >

1 Periodicity

AQA > Physical chemistry > Thermodynamics >

2 Born-Haber cycle

AQA > Physical chemistry > Atomic structure AS >

4 Electronic arrangement

AQA > Physical chemistry > Atomic structure AS >

1 Subatomic Particles and Isotopes

AQA > Physical chemistry > Atomic structure AS >

5 Ionisation Energies

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