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Unformatted text preview: • The three p orbitals lie 90o apart in space d Orbitals
• d sublevel has 5
orbitals typical d orbital 33 planar node planar node 34 The shapes and labels of the
five 3d orbitals. 35 ff Orbitals
For l = 3,
---> f sublevel with 7
orbitals Diagonal Rule
• Must be able to write it for the test!
This will be question #1 ! Without it,
you will not get correct answers !
• The diagonal rule is a memory device
that helps you remember the order of
the filling of the orbitals from lowest
energy to highest energy
• _____________________ states that
electrons fill from the lowest possible
energy to the highest energy 36 37 Diagonal Rule
Steps: 1s Write the orbitals in s, p, d, f order. Write
the same number of orbitals as the energy
level. 3. 3s Write the energy levels top to bottom. 2. 2s 1. Draw diagonal lines from the top right to the
bottom 4. To get the correct order,
3p 3d follow the arrows!
follow 4s 4p 4d...
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