Electron Configurations for the modern model of the atom

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Presentation transcript:

Electron Configurations for the modern model of the atom

Orbitals are the region of most probable location of electrons in an atom Heisenberg Uncertainty Principle Impossible to know exact location and momentum of any electron in an atom.

The orbitals in the atom correspond to the blocks of the periodic table

S orbital spherical fits 2 electrons

P orbitals dumbbells fit 2 electrons each

D orbitals Clover Leaf fit 2 electrons each

F orbitals

Not so easy to draw so we revert to the Bohr model Draw Magnesium Bohr Model of Atom Modern Model (Quantum) 12n 12p 12n 12p Not so easy to draw so we revert to the Bohr model

How to fill an orbital diagram . . . . and figure out its electron configuration How to fill an orbital diagram

Showing energy of electrons in their orbitals Empty orbital diagram Showing energy of electrons in their orbitals least energy at the bottom to the most going up 1s 2s 2p 3s 3p

e- represented with arrows e- occupy lowest E levels first e- will occupy separate orbitals if possible e- in the same orbital must have opposite spins

H 1s 2s 2p 3s 3p 1s1

H

He 1s 2s 2p 3s 3p 1s2

He

Li 1s 2s 2p 3s 3p 1s22s1

Li

Be 1s 2s 2p 3s 3p 1s22s2

B 1s 2s 2p 3s 3p 1s22s22p1

B

C 1s 2s 2p 3s 3p 1s22s22p2

N 1s 2s 2p 3s 3p 1s22s22p3

O 1s 2s 2p 3s 3p 1s22s22p4

K 1s 2s 2p 3s 3p 4s 4p 3d 1s22s22p63s23p64s1

K

Ca 1s 2s 2p 3s 3p 4s 4p 3d 1s22s22p63s23p64s2

1s 2s 2p 3s 3p 4s 4p 3d Sc 1s22s22p63s23p64s23d1

Sc

Electron summary p can hold a total of 6 electrons s can hold 2 electrons p can hold a total of 6 electrons 2 in each orbital d can hold a total of 10 electrons

So how many electrons in each energy level? E level 1 = 2 e- E level 2 = 8 e- E level 3 = 18 e- E level 4 = 32 e- But NEVER more than 8 valence e- because of the order the e- fill!

The End