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Chemistry- Unit 1
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Covalent Radius
The size of an atom
Covalent radius trend
decreases along a period as the increased number of protons pulls the outer electrons closer
increases down a group as there is a greater number of electron shells
Ionisation energy
The amount of energy required to remove one mole of electrons from one mole of gaseous atom
Electronegativity
the measure of attraction an atom has for the electrons in the bond
Ionisation energy and electronegativity trend
increases along a group as the number of protons increases
decreases down a group as the number of electron shells increases, causing there to be a greater screening effect