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MAKING A BOHR MODEL
In 1913, Neils Bohr proposed his model of the atom. This
pictured the atom as having a dense, positively charged nucleus
and negatively charged electrons in specific orbits, also called
energy levels or shells, around the nucleus.
Because of its simplicity and general ability to explain chemical
change, the Bohr model is still used today.
In a Bohr model, the nucleus is drawn as a circle with the
number of protons & neutrons written inside the circle. Then the
electron orbits (a.k.a. energy levels or shells) are drawn around
the nucleus. A dot is placed on each orbit to represent each
electron present in the atom.
For example, here is a Bohr model of the Neon atom.
10 P
10 N
Energy Level
1
2
3
4
5
Neon has an atomic
number of 10 and a
Mass number of 20.
This means there
are 10 protons, 10
neutrons, and 10
electrons
Maximum number of electrons
2
8
18
32
32