Bohr Models [ Joanne ]

number of electrons = number of protons in a neutral atom
number of neutrons = atomic mass - the number of protons.
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- Atoms are electrically neutral
- Two different models can be used to describe the electron configuartion:
1.) Energy Level Model
2.) Bohr Model

BOHR MODEL
Electrons occupy shells which are divided into orbitals
2e in the first Orbital
8e in the second orbital
8e in the third orbital
(the ones with the 8e are called Octet)

Ex. Aragon (Energy level Model)
8e- 3rd level
8e- 2nd level
2e- 1st level

40 <---atomic mass 18 Ar <---- atomic number / number of protons

Bohr model of Argon

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Ex. Chlorine (Energy Level Model)

7e- 3rd level
8e- 2nd level
2e- 1st level

35
1 Cl

Chlorine (Bohr Model)

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Ex. Fluorine (Energy Level Model)

7e- 2nd level
2e- 1st level

19
9 F

Flourine (Bohr Model)

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Hybridized orbitals
- The first of the bohr levels is the 1st orbital and it holds only 2e
the second level contains the 2s, 2px, 2py, 2pz orbitals. they combine (hybridize) to form one 2sp3 orbital

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