Bohr's Conclusions lesson illustration

 

When an atom GAINS energy,
it is said to be an _______ state

 

 

Bohr's Conclusions lesson illustration

The Aurora Borealis, or Northern Lights,
shines above Bear Lake, Eielson Air Force Base, Alaska

gallery
(Full Image)

 United States Air Force photo by Senior Airman Joshua Strang

 

 

Fill In The Blank Notes

 

 

Think of an atom as a
 miniature solar system

Bohr's Conclusions lesson illustration

 

3 orbits are permitted
for this atom



1. Permitted orbits of an electron in an atom are limited

 

 

2. Each orbit is a different energy

 

 

3. Inside orbits have lower energies than the outside ones

 

 

4. When electrons in an atom change energy states they absorb or release energy

 

 

 


Bohr's Conclusions lesson illustration Up energy level,Bohr's Conclusions lesson illustration

energy absorbed










Bohr's Conclusions lesson illustration Down energy level, Bohr's Conclusions lesson illustration

energy  released
 
as light

 

 

 

 

Permitted Orbital Energies
for Hydrogen

 

 

Reference table

 

Bohr's Conclusions lesson illustration 

 

 

 

 

Each orbital is associated with a specific energy

 

Energy
Level #

Energy

 

n = 3

-1.51 eV

 

Excited State

 

n = 2

-3.40 eV

 

Excited State

 

n = 1

-13.6 eV

Ground State
Lowest Energy Level

 

 

 

Electrons can only absorb or emit energy that is equal to the difference between the absolute value of 2 energy levels.

 

 

 

 

 

A single photon of energy is given off when electrons
go down
energy levels
.

 

 

Bohr's Conclusions lesson illustration

 

Check Your Understanding

5 quick questions — pick an answer to see if you’re right.

1. When an atom gains energy, its electron moves up and the atom is in…

2. Compared to outer orbits, inner orbits of an electron have…

3. A hydrogen electron drops from n = 3 (−1.51 eV) to n = 2 (−3.40 eV). What energy photon is emitted?

4. When an electron moves down an energy level, the atom…

5. The Northern Lights glow because electrons in atoms are…