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Electronegativity - Coggle Diagram
Electronegativity
electronegativity determines bond type
covalent
pure covalent=difference=0
non-polar covalent= less than 0.5
electrons are shared equally
eg. H2
polar covalent
low= between 0.5 and 1.8
electrons are shared but unequally
eg. HCl
ionic
high= more than 1.8
the metal gives an electron to non-metal
eg. NaCl
polar bonds and partial charges
H+------->Cl
points towards the more electronegative element (Cl)
Cl has shared pair of electrons, more electrons than H so it's partially negative. H is partially positive)
H---->O<-----H
water is polar because dipoles don't cancel each other out
O<----C---->O
decrease down a group
increase number shells so the shielding increases
atomic radius increases
increases across a period
nuclear charge increases
atomic radius decreases
ability of an atom to attract bonding electrons