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Coulombic Attraction

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by

Shelli Stinson

on 9 January 2017

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Transcript of Coulombic Attraction

Coulombic Attraction
Coulombic Attraction
attraction between the nucleus (+) and electrons (-).
Affected by 2 factors
Nuclear Charge
Why is this important?
Coulombic attraction determines the tendency for atoms to form chemical bonds.
Coulombic Attraction affects 3 trends on the periodic table
Atomic radius
Ionization energy
Electronegativity
Distance
As energy levels are added moving from period to period, distance between nucleus and valence electrons increases, the coulombic attraction decreases
Weak coulombic attraction
As coulombic attraction decreases, elements are more likely to lose their valence electrons
Metals lose electrons and form positive ions
Postive ions are called CATIONS
Strong coulombic attraction
As coulombic attraction increases, elements are more likley to gain valence electrons from other atoms
Non-metals gain electrons and form negative ions
Negative ions are called ANIONS
Nuclear charge
is the positive charge in the nucleus



Atomic radius- half the distance between the nuclei of two identical, adjacent atoms.
Ionization energy- energy required to remove valence electrons


Electronegativity- tendency for an atom to attract another atom's electrons

2
3
4
+11
+13
+17
Period 3
The more protons, the higher the nuclear charge
In a given period, elements to the far right ( highest # of protons) have the highest nuclear charge AND coulombic attraction
Full transcript