Science Academic 10 - Chemistry
Atoms – Bohr Rutherford Model
Science Perspectives – Section 5.4
Pages 184-187
Bohr-Rutherford Model of the Atom
Electrons move in orbits around the
nucleus
Electrons do NOT exist between orbits.
However, electrons can move between
orbits.
There are a maximum number of
electrons in each orbit.
Orbit 1 can have two electrons
Orbit 2 can have eight electrons
Orbit 3 fills until it has eight electrons.
Then, Orbit 4 starts adding electrons until
it has two electrons. Then, Orbit 3 begins
filling again until it has a maximum of 18
electrons.
Orbit 4 can have 32 electrons
(Na). Sodium has an Atomic Number of
11. Sodium has 11 protons in the
nucleus and 11 electrons in its orbits.
The 11th electron is found in Orbit #3.
HOMEWORK
Page 187 – Questions 4, 8, 9