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chapter 8
periodic tabe and atomic properties
13
Chemistry
Undergraduate 1
11/12/2011

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Term
valence orbitals
Definition
elements in same group have same number of electron in the oribital
HIGHEST ASSOCIATED PRINCIPAL QUANTUM NUMBER
Term
Effective nuclear charge (z eff)
Definition
actual nuclear charge less the screening effect of all the other electrons
Term
core electrons
Definition
those with n value less than the valence electron
Term
shielding
Definition
when core electrons shild the outer valence electrons from full charge (Z)
Term
atomic radius
Definition
how big the atom is
dependent on N for valence electrons
Term
ionic radii
cations and anions
Definition
anions are larger
cations are smaller
Term
isoelectronic
Definition
series of ions with the same number of electrons
Term
first ionization energy
Definition
atom is the min energy required to remove an electron from a gas phase to form a CATION
Term
which group has the highest ionization energy
Definition
gases
Term
electron affinity
Definition
energy change upon addition of an electron to an atom in the gas phase to form a NEGATIVE ION
Term
magnetic properties
diamagnetic and paramagnetic
Definition
dia: atom with all electrons paired
para: atowm with some unpaired
Term
metallic properties
Definition
ease of losing electrons
large atomic radi and low ionization energies
Term
non metallic properties
Definition
ease to GAIN electrons
small radi, high ionization energy and large electron affinity
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