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periodicity, group 2-7 and tests for ions module 3

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definition of first ionisation energy

energy required tio remove 1 mole of electrons from 1 mole of gaseous atoms to form 1 mole of gaseous +1 ions

why does it decrease down the group?

atomic radius and shielding by inner shells increases, nuclear attraction on outer shell electrons decreases

what is the periodic trend in melting points across period ?

increases from group 1 to 4, then decreases from group 5 to 0/8

equation for Ca(OH)2 neutrailising acidic soils

Ca(OH)2 + 2H+ = Ca2+ + 2H2O

when carbonate test is positive ?

bubbles

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OCR
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Chemistry A
Course
AS Unit F321 - Atoms, Bonds and Groups

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1. Flashcards - Enthalpy module 3
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3. Flashcards - Periodicity, group 2-7 and tests for ions module 3
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1. Flashcards - Enthalpy module 3
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7. Flashcards - Shapes of covalent bonds and electronegativity
8. Flashcards - Bonding and structure, intermolecular forces
9. Flashcards - Periodicity, group 2-7 and tests for ions module 3
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2. Flashcards - Orders of reaction & half-life
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5. Flashcards - Formulaes of complex ions and definitions of atomic mass
6. Flashcards - Ionic and covalent + coordinate bonds
7. Flashcards - Shapes of covalent bonds and electronegativity
8. Flashcards - Bonding and structure, intermolecular forces
9. Flashcards - Periodicity, group 2-7 and tests for ions module 3
10. Summary - Electronic structure & bonding and structure summary
11. Summary - Module 3 periodicity, group 2 and halogens summary
12. Summary - Enthalpy module 3 summary
13. Summary - Eletrochemical cells summary
14. Summary - Rates of reactions and equilibria chemistry notes
15. Summary - Acids, bases,ph, titration curves chemistry notes
16. Summary - Lattice enthalpy and entropy, born haber cycles chemistry notes
17. Summary - Transition elements and redox chemistry notes
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