Chemistry 5.0
Name ______________________________
Date ____________________ Period ____
Homework I
Bohr reasoned that the obits of electrons
surrounding the nucleus must have a definite diameter.
He determined that an electron could emit energy of
one or two quanta, but not 1.5 or 3.2 quanta, as it fell
to a lower energy level.
A ball bouncing from one step to another
represents the motion of an electron as it falls from
one energy level to another. The bottom of the staircase
represents the lowest energy level in an atom.
The spectra produced by a compound can be
used to determine the elements in the compound. Each
line of the spectrum represents one frequency of light
and therefore a certain energy. This energy is determined
by the movement of electrons between energy levels
which are specific for each element. The same set of
energy levels will always produce the same spectrum.
When an electron falls from a higher to lower energy level,
a photon of light is emitted. The greater the difference in
energy levels is the greater the energy of the emitted light.
As an electron moves farther from the nucleus, it absorbs energy.
_______________________a. According to the formula c=, as the frequency gets larger, the
wavelength gets ____.
_______________________b. Which light waves contain more energy, infrared or ultraviolet?
_______________________c. Do microwave ovens produce waves with short or long wavelengths?
_______________________d. Microwaves are high-energy waves that can be used for cooking.
What equation can be used to show why a microwave has high energy?
_______________________ e. The smallest orbit of an electron is called its ____ state.
_______________________ f. _____________ said it is impossible to state the exact position and
momentum of a moving object.
_______________________ g. Light travels in waves, but it acts like matter when it interacts with
small matter like an electron. This shows the ____ nature of light.
_______________________ h. An electron must _______ energy to move to a higher energy level.
_______________________ i. Visible radiations are less destructive because they have less ______
than UV radiation.
_______________________ j. An electron is in a(n) ____ state when it goes from a lower energy
level to a higher energy level.