CHEM 131 Lesson 4 Quiz

(a) What is the full ​and abbreviated electron configuration for this element? Explain how you
arrived at this configuration. In other words, don't just give me the configuration, but walk me
through and explain to me how exactly you arrived at your answer.
(b) In this Lesson we talked about the relationship between frequency and wavelength. The
relationship can actually be expressed as
where ​f is ​ the frequency, ​c is the speed of light (see below), and ​lambda (the symbol on the left
of the equals sign that looks like an upside down y) is wavelength. The particle nature of light
was first proposed by Einstein, who suggested that light could be described as a stream of
particles ​ called photons. ​ A photon of a certain wavelength (​lambda) has an energy (​E) given by
the equation:
where ​E is the energy ​ of the photon in J, ​h is Planck's constant (6.626 x 10​ -34​ J*s), and ​c is the
​
speed of light (3.00 x 10​ 8​ m/s). If we determine the wavelength (​lambda) of light emitted from a
sample of antimony to be 206.8 nm, what is the energy (E) and frequency (f) that corresponds to
this wavelength?
12. Think about it--why is the line spectrum produced by excited barium atoms more complex
than the line spectrum produced by excited sodium atoms? Be sure to base your answer on what
we discussed in THIS class and use the terminology from the materials in THIS course. Your
answer must be sufficiently detailed to receive credit