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questionbase.50megs.com AS-Level Revision Notes

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AS Chemistry ­ Revision Notes Unit 1 ­ Atomic Structure, Bonding And Periodicity
Atomic Structure 1. All atoms have a mass number, A (the number of nucleons), and a proton number, Z (the number
of protons). 2. Isotopes have different numbers of neutrons, and have different physical properties but the…

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a. The distance from the nucleus. b. The nuclear charge / attraction. c. The amount of shielding. 11. Going down a group, the first
ionisation energy will always decrease because the electron is
further from the nucleus, and has more shielding, even for the increase in nuclear charge. 12. Going…

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questionbase.50megs.com AS-Level Revision Notes

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a. 6:6 coordination number if one ion is much smaller than the other (e.g. NaCl) b. 8:8 coordination number if both ions are
roughly the same size (e.g. CsCl) 7. A unit cell is the smallest unit of structure that has all the features of the lattice, and can build…

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Pages in this set

Page 1

Preview of page 1
questionbase.50megs.com AS-Level Revision Notes

Page 2

Preview of page 2
AS Chemistry ­ Revision Notes Unit 1 ­ Atomic Structure, Bonding And Periodicity
Atomic Structure 1. All atoms have a mass number, A (the number of nucleons), and a proton number, Z (the number
of protons). 2. Isotopes have different numbers of neutrons, and have different physical properties but the…

Page 3

Preview of page 3
a. The distance from the nucleus. b. The nuclear charge / attraction. c. The amount of shielding. 11. Going down a group, the first
ionisation energy will always decrease because the electron is
further from the nucleus, and has more shielding, even for the increase in nuclear charge. 12. Going…

Page 4

Preview of page 4
questionbase.50megs.com AS-Level Revision Notes

Page 5

Preview of page 5
a. 6:6 coordination number if one ion is much smaller than the other (e.g. NaCl) b. 8:8 coordination number if both ions are
roughly the same size (e.g. CsCl) 7. A unit cell is the smallest unit of structure that has all the features of the lattice, and can build…

Comments

No comments have yet been made