U1-2-3 - Electronegativity
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A measure of attraction an atom has for shared electrons
Electronegativity
Explain why electronegativity decreases down a group. 1. ________________________ 2. Shared e− are less strongly attracted to the nucleus
Increased screening
Explain why electronegativity decreases down a group. 1. Increased screening 2. Shared e− are ________________ to the nucleus
less strongly attracted
Explain why electronegativity increases across a period. 1. ________________________ 2. Shared e− are more strongly attracted to the nucleus
Increasing nuclear charge
Explain why electronegativity increases across a period. 1. Increasing nuclear charge 2. Shared e− are ________________ to the nucleus
more strongly attracted
Electronegativity
A measure of attraction an atom has for shared electrons. Must be electrons plural
Elements with low electronegativities act as ________ agents.
reducing
Elements with high electronegativities act as ________ agents.
oxidising
Elements with ____ electronegativities act as reducing agents.
low e.g. metals
Elements with ____ electronegativities act as oxidising agents.
high e.g. fluorine or oxygen