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Electrons, Bonding & Structure
Electron Structure

S sub-shell = 2 electrons P sub-shell = 6 electrons D sub-shell = 10 electrons F sub-shell = 14 electrons
Orbital = space an electron moves in. S orbitals are spherical. P orbitals are dumbbell shaped.
Rule 1: 4s before 3d (write normal in…

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Calculating the number of electron pairs:
o Find the central atom and work out the number of outer electrons.
o Find the number of atoms bonded to the central atom.
o Add up the electrons and divide by 2.
o Work out the number of lone pairs.


Electronegativity is…


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