Lecture notes
Ch106 - Periodic table trends
- Institution
- The University Of Strathclyde (UOS)
Dr. Kennedy's Main group chemistry part covering periodic table trends
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Periodic LawThe properties of the elements are
periodic functions of their atomic
number
S orbital single orbital
p orbital three degenerate
d orbital five degenerate
f orbital seven degenerate
One orbital fits two electrons
up and down spin
Main group
FEYYLT.gs
jj
, Effective nuclear charge Positive charge
experienced by an electron from the
nucleus
ENC increases across the period
Nuclear charge inner electrons
ENC decreases down the group
Atomic radius Measured as half the
distance between two nuclei
d
rA Z
d
Going across period decreases atomic radius
caused by increasing ENC
Going down a
group increases atomic radius
0
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