3 Relative Atomic and Molecular Mass

 

 

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1.1 Atom1 Page 3 - 4

Oxford Textbook Pages : 10 - 13

CGP Revision Guide Pages : 5 - 7

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Show Specification Ref : 3.1.1.2

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Question 1 / 5

AQA Jan 2010 Paper 1 Q5 section b answer all questions in the spaces provided pmt areas outside the box will not be scanned for marking a mass spectrometer can be used to investigate the isotopes in an element a define the term relative atomic mass of an element marks extra space b element x has a relative atomic mass of identify the block in the periodic table to which element x belongs and give the electron configuration of an atom of element x calculate the number of neutrons in the isotope of x which has a mass number marks extra space question continues on the next page turn over wmp jan chem pmt areas outside the box will not be scanned for marking c the mass spectrum of element z is shown below use this spectrum to calculate the relative atomic mass of z giving your answer to one decimal place identify element z relative abundance m z marks extra space wmp jan chem pmt areas outside the box will not be scanned for marking d state how vaporised atoms of z are converted into z ions in a mass spectrometer state and explain which of the z ions formed from the isotopes of z in part c will be deflected the most in a mass spectrometer marks extra space e explain briefly how the relative abundance of an ion is measured in a mass spectrometer marks extra space turn over wmp jan chem
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Question 2 / 5

AQA Jan 2011 Paper 1 Q2 do not write outside the box a indium is in group in the periodic table and exists as a mixture of the isotopes in and in use your understanding of the periodic table to complete the electron configuration of indium s s p s p s d p mark b a sample of indium must be ionised before it can be analysed in a mass spectrometer b i state what is used to ionise a sample of indium in a mass spectrometer mark b ii write an equation including state symbols for the ionisation of indium that requires the minimum energy mark b iii state why more than the minimum energy is not used to ionise the sample of indium mark b iv give two reasons why the sample of indium must be ionised reason reason marks wmp jan chem do not write outside the box c a mass spectrum of a sample of indium showed two peaks at m z and m z the relative atomic mass of this sample of indium is c i give the meaning of the term relative atomic mass marks c ii use these data to calculate the ratio of the relative abundances of the two isotopes marks extra space d state and explain the difference if any between the chemical properties of the isotopes in and in difference in chemical properties explanation marks e indium forms a compound x with hydrogen and oxygen compound x contains indium and hydrogen by mass calculate the empirical formula of compound x marks turn over wmp jan chem
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Question 3 / 5

AQA Jan 2012 Paper 1 Q7 the mass spectrum of a sample of krypton taken from a meteorite is shown below do not write outside the box relative abundance m z a use this spectrum to calculate the relative atomic mass of this sample of krypton give your answer to one decimal place explain why the value you have calculated is slightly different from the relative atomic mass given in the periodic table marks extra space wmp jan chem b state how krypton is ionised in the mass spectrometer do not write outside the box write an equation including state symbols to show the reaction that occurs when the first ionisation energy of kr is measured sometimes the mass spectrum of kr has a very small peak with an m z value of explain the occurrence of this peak marks extra space end of questions wmp jan chem
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Question 4 / 5

AQA Jun 2012 Paper 1 Q1 section a answer all questions in the spaces provided do not write outside the box the element rubidium exists as the isotopes rb and rb a state the number of protons and the number of neutrons in an atom of the isotope rb number of protons number of neutrons marks b i explain how the gaseous atoms of rubidium are ionised in a mass spectrometer marks b ii write an equation including state symbols to show the process that occurs when the first ionisation energy of rubidium is measured mark c the table shows the first ionisation energies of rubidium and some other elements in the same group element sodium potassium rubidium first ionisation energy kj mol state one reason why the first ionisation energy of rubidium is lower than the first ionisation energy of sodium mark wmp jun chem do not write outside the box d i state the block of elements in the periodic table that contains rubidium mark d ii deduce the full electron configuration of a rubidium atom mark e a sample of rubidium contains the isotopes rb and rb only the isotope rb has an abundance times greater than that of rb calculate the relative atomic mass of rubidium in this sample give your answer to one decimal place marks f by reference to the relevant part of the mass spectrometer explain how the abundance of an isotope in a sample of rubidium is determined name of relevant part explanation marks g predict whether an atom of sr will have an atomic radius that is larger than smaller than or the same as the atomic radius of rb explain your answer atomic radius of sr compared to rb explanation marks turn over wmp jun chem compound x is shown below it is a member of a homologous series of hydrocarbons do not write outside the box h h ccch c h a i deduce the general formula of the homologous series that contains x mark a ii name a process used to obtain a sample of x from a mixture containing other members of the same homologous series mark b there are several isomers of x b i give the iupac name of the position isomer of x mark b ii draw the structure of a functional group isomer of x c at high temperatures one molecule of c h can be converted into two molecules of x and one molecule of another compound c i write an equation for this reaction mark mark wmp jun chem
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Question 5 / 5

AQA Jun 2016 Paper 1 Q1 section a answer all questions in the spaces provided do not write outside the box mass spectrometry is a technique that can be used to separate isotopes of an element in order to determine relative atomic mass a give the meaning of the term relative atomic mass marks b in a spectrometer isotopes are converted into ions that are separated by deflection and are then detected b i ions are deflected using mark tick one box an electric field an electron gun a magnetic field a potential difference b ii describe how the ions are detected marks wmp jun chem do not write outside the box c table gives the relative abundance of each isotope in the mass spectrum of a sample of silicon recorded using a high resolution mass spectrometer table m z relative abundance use the data to calculate a value for the relative atomic mass of this sample of silicon give your answer to decimal places marks d a second mass spectrum was recorded for the same sample of silicon the energy of the electrons from the electron gun was higher for this second spectrum state and explain one similarity and one difference between the two spectra marks similarity explanation difference explanation turn over wmp jun chem
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