Aqa Gcse Combined C2 Test 4 Intermediate - Bonding Structures And Properties Of Matter

GCSEAQA - Combined Science GradeMaterialsFor this paper you must have:RulerPencil and RubberScientific calculator, which you are expected to use when appropriateInstructionsAnswer all questionsAnswer questions in the space providedAll working must be shownInformationThe marks for the questions are shown in brackets Name:CHEMISTRYMarkDate:C2 - Test 4 BONDING, STRUCTURE AND PROPERTIES OF MATTERIntermediate www.examqa.comPage 1 of 16Aluminium is a useful metal.(a) The atomic number (proton number) of aluminium is 13. Complete the diagram to show the electronic structure of an aluminium atom.Use crosses (x) to represent the electrons.(1)1.(b) Aluminium is used as the electrical conductor for overhead power cables. Explain why metals are good conductors of electricity.____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________(2)(Total 3 marks) www.examqa.comPage 2 of 16(a) The diagram shows an atom of magnesium and an atom of chlorine. Magnesium Chlorine2.Describe, in terms of electrons, how magnesium atoms and chlorine atoms change intoions to produce magnesium chloride (MgCl2).________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________(4)(b) Calculate the relative formula mass (Mr) of magnesium chloride (MgCl2).Relative atomic masses (Ar): magnesium = 24; chlorine = 35.5_________________________________________________________________________________________________________________________________________________________________________________________________________Relative formula mass (Mr) = ________(2)(Total 6 marks) www.examqa.comPage 3 of 16(a) The table gives information about two isotopes of hydrogen, hydrogen-1 and hydrogen-2. Hydrogen-1 Hydrogen-2Atomic number 1 1Mass number 1 2An atom of hydrogen-1 is represented as:Show how an atom