CHEM 131 Lesson 4 Quiz

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1. Having learned about electromagnetic radiation in this lesson, which of these statements
about it is true?
2. In terms of wavelength, which of these is the longest?
3. Which of the following statements is true about atomic size?
4. Write out the electron configurations of the ions below and determine which one is listed with
an incorrect charge. (the numbers and charges written after the elemental symbol should be
understood as superscripts)
5. If I time the movement of waves for 1 second, and calculate that 100 waves passed through in
that 1 second, what have I calculated?
6. Geometrically linear means that the electron groups have what angle?
7. Geometrically trigonal planar means that the electron groups have what angle?
8. Some atoms are better at attracting electrons compared to others. Which term below best
describes that?
9. According to the electronegativity table, the value for barium and sulfur is 0.9 and 3.5,
respectively. What type of bond would you expect to form between these two elements?
10. Regarding boron trifluoride, which of these is TRUE?
11. On December 5, 1971, at the mere age of 35, the great composer Wolfgang Amadeus
Mozart died after a three month long battle with illness. Rumor was that a rival musician had
poisoned him, but it turned out that common consensus was that the antimony prescription that
doctors had prescribed him was actually poisoning him.

2. (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