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AQA 2025 AS CHEMISTRY 7404/2 Paper 2 Organic and Physical Chemistry Question Paper & Mark scheme Latest Version

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1. Define relative atomic mass The relative atomic mass of an element is the average mass of one atom of an element relative to one twelfth of the mass of one atom of 12C. 2. define relative molecular mass The average mass of a molecule compared to one twelfth of the mass of one atom of carbon-12. 3. number of moles using avogadros n = number of particles / Avo- gadro Constant 4. describe ionic bonding metal and a non-metal, Electrons are transferred from the metal to the non-metal, The oppositely charged ions are held together by strong electrostatic forces of attraction 5. Describe covalent bonding non-metals with other non-met- als. shared pair of electrons be- tween the 2 atoms, each nucleus is attracted to the shared pair of electrons - holds 2 atoms togeth- er. 6. what are the two types of electron pairs in covalent molecules bonding pair and lone pair 7. what is the bonding pair A shared pair of electrons 8. what is a lone pair a pair of electrons which is not involved in a bond / a pair of elec- trons that are not shared 9. what is coordinate / dilative covalent bond 10. How does a co-ordinate bond form? one atom donates both electrons in the shared pair. 11. how is a co-ordinate bond reprinted in a diagram 12. describe the structure of the metallic bond 13. describe the formation of a metallic bond 14. what does the strength of the metallic bond depend on 15. how does the charge on the ion affect the strength of the metallic bond the atom which donates both electrons to the covalent bond has a lone pair of electrons . The atom that accepts the electron pair is an atom which does not have a full outer shell of electrons. an arrow that points to the atom that is accepting the lone pair as an array of positive metal ions surrounded by a sea of delo- calised electrons. The outer shell electrons on each of the metal atoms become free to move. electrons are now de- localised. The metal atoms are now positive ions. The attraction between the positive ions and the negative electrons holds the structure together. This attraction is the metallic bond. The charge on the

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AQA 2025 AS CHEMISTRY 7404/2 Paper 2
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AQA 2025 AS CHEMISTRY 7404/2 Paper 2

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AQA 2025 AS CHEMISTRY 7404/2 Paper 2
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  • chemistry 74042 paper 2 organic and physical chem
  • aqa organic and physical chemistry question paper
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