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PERIODIC TABLE, Physical - Coggle Diagram
PERIODIC TABLE
Attemtpts to make PT
Lothar meyer's curve
Mendeelev
Newland octaves
Modern periodic table
Henry mosley
GIOC
Chemical
Nomenclature of elements > 100
Contents
Physical
Screening effect
Slater rule
ns-np rule
d or f
screening effect power ns > np > nd > nf
increases both L to R and down the group
Atomic radius
Types
Covalent
has overlapping
Rc = 1/2 bond length
Metallic
Rm > Rc
closley packed but no overlap
Vander wals radius
size of atom which imcles its valence in non bonded situation
present in inert gases
Ionic
Radius of cation
smaller than neutral atom
Radius of anion
greater than neutral atom
Isoelectronic
smaller ratio of Z/e, larger the radius
basics
r cation + r anion = r ionic radii
Periodicity
Increases down the group
Decreases left to right the period
IP
Applications
Stability of oxidation states
diff in consec IP
< 10
16 eV
10-15
Penetration effect
Electron gain enthalpy
