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IB Chemistry (SL)
Atomic Structure
Topics 2 & 3 - Atomic Structure & Periodicity
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Chemistry
Atoms
IB Chemistry (SL)
Atomic Structure
12th
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1
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Define 1st ionization energy. + standard
The energy required to remove one electron from a gaseous atom. Standard means its at STP.
2
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Define 2nd ionization energy.
The energy required to remove one electron from a monopositive gaseous atom.
3
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Define 1st and 2nd ionization energy.
The energy required to remove two electrons from a gaseous atom.
4
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Define 1st electron affiinity.
Energy change when an electron is added to a gaseous atom.
5
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Define electronegativity.
Ability of an atom to attract a pair of bonded electrons.
6
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Define atomic radii.
Half the inernuclear distance, half the distance between two bonded atom’s nuclei.
7
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Why does the atomic radii decrease across periods?
* The electrostatic attraction beween protons and electrons increases as atomic # increases.
* Electrons are added to the same shell
8
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Reactivity increases or decreases down the alkali metals and the halogens?
* Increase down the alkali metals
* Decrease down the halogens
9
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Name both of the f-block periods.
* Lanthanides
* Actinides
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