Flashcards
Periodicity
Cards in this deck (7)
- 1Ionisation EnergyEnergy required to remove one electron from each atom in a mole of gaseous atoms to form 1 mole of 1+ gaseous ions
- 23 factors affecting increase in ionisation energy1-increase in number of protons(nuclear charge)
2-decrease in atomic radius
3-shielding - 3IE down a group-atomic radius increases
-more shells of e- so more shielding
-increase in shielding outweighs increase in nuclear charge
-so nuclear attraction decreases - 4IE across a periodIncreases due to increase in nuclear charge-same shielding and decreased A-radius so increase in nuclear attraction
group 2-3 dip: as now a p-electron is being removed and as they are at higher energies-easier to lose an electron
group 5-6 dip: as now we are removing an electron from an orbital with paired electrons- the repulsion between them makes it easier to remove an electron - 5Atomic Radius across a period-Decreases across a period -more protons in nucleus-more charge-so stronger attraction between nucleus and outer shell which pulls the outer shell closer to nucleus
- 6Electronegativity across a periodIncreases as A-radius decreases
-increased nuclear charge and attraction so easier to gain incoming electron - 7Mp,s and Bp,s across a period-Increase from Na to Al as stronger metallic bonding due to decrease in ionic radius, higher charge on the ion and more delocalised electrons so stronger attraction between positive ions and negative electrons
-Silicon is higher as it has a giant covalent structure due to strong covalent bonds
-Decreases when going to P4 due to weak london forces-increases when coming to S8 as bigger molecule -more electrons so stronger london forces-decrease in Cl2 as smaller molecule and decreases again when coming to Ar as monatomic and weak london forces between atoms
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- A level Chemistry (Module 3) Flashcards on Periodicity, created by Abdurrahman Nana on 02/02/2022.
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- Abdurrahman Nana · Feb 2022
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- Feb 2, 2022
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