BOHR’S BIG IDEAS
In 1913, this scientist proposed a new model of the atom.
Neil BOHR
What shell is the closest to the nucleus
k-shell
What does an electron NOT do while moving in a shell
It doesn’t lose energy
According to Bohr, electrons do not move randomly around the nucleus; they move in these.
Fixed circular paths
What letter is used for the second shell
L
What is the value of the first energy level
1
Bohr called these fixed paths around the nucleus “stationary states,” “orbits,” or
SHELLS
How many electrons can fit in the k shell
2
what happens to. A electron as it comes closer to the nucleus
It loses energy
Another name for the shells in Bohr’s model is this
Energy levels
What happens to the electrons as they move away from the nucleus
Their energy increases
What electrn has a greater energy n=1 or n=3
N=3
What major problem with Rutherford’s model was Bohr’s model designed to help explain?
→ Answer: The stability of atoms / why electrons do not lose energy and collapse into the nucleus.
If an electron is in the L-shell (n = 2) instead of the K-shell (n = 1), which electron has more energy?
The electron in L shell
An electron moves from one energy level to another. What determines the amount of energy it absorbs or releases?
The difference in energy between the two levels.