AQA Chem 1: Unit 1 Foundation Chemistry AQA Chemistry Unit 1 Revision Questions. 4.5 / 5 based on 11 ratings ? ChemistryBonding & shapesCalculationsASEdexcel Created by: GoldenglossCreated on: 12-05-12 21:53 What does atomic number, (Z) represent? Number of protons 1 of 22 What does mass number, (A) represent? Number of protons + Number of neutrons 2 of 22 What is the correct definiton for the term isotope? Atoms with the same number of protons but different number of neutrons 3 of 22 What is the order of events that happen in the mass spectrometer? Ionisation, Acceleration, Delfection, Detection 4 of 22 After being Ionised in the Mass Spectrometer what charge is left on the majority of atom/molecule? 1+ 5 of 22 About 5% of the atoms/molecules form 2+ charge? True 6 of 22 How are the positve ions accelerated in the Mass Spectrometer? Attracted towards a negatively charged plate 7 of 22 What do the ions speed depend upon? Their Mass 8 of 22 What deflects the ions? Magnetic Field 9 of 22 Heavier ions are defelcted less and lighter ions are deflected most? True 10 of 22 How is an ion detected? Hit the detector, accept an electron, lose their charge and create a current 11 of 22 what is on the x axis of a mass spectrum graph? Mass/Charge ratio 12 of 22 what is on the y axis of a mass spectrum graph? Relative Abundance/ % 13 of 22 Complete the electron arrangement of Chlorine 1s2 2s2 2p6 3s2 3p5 14 of 22 Complete the electron arrangement of Chromium 1s2 2s2 2p6 3s2 3p6 3d5 4s1 15 of 22 Complete the electron arrangement of Copper 1s2 2s2 2p6 3s2 3p6 4s1 3d10 16 of 22 The definition for first ionisation energy is? The energy required to remove one mole of electrons from one mole of atoms in a gaseous state 17 of 22 General trend of ionisation energies down a group? Decreases, distance of outer electron gets further away from the nucleus. Electrons in a higher energy level. More Shielding. 18 of 22 General trend of ionisation energies across period? Increase. More protons, therefore nucleur charge increases. Electrons enter same energy level, therefore smaller atomic radius. Similar shielding. 19 of 22 General trend of atomic radius of period 3 elemts, Na ---> Cl? Decreases, more protons, similar shielding 20 of 22 A deviation in ionisation energies in period 3. Sulphurs ionisation energy is less than Phosphorus 21 of 22 Why does the above deviation occur? Paired electron, in 3p orbital. And they repel 22 of 22
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