Name ____________________
CHEM 1004
Quiz #2
Spring 2011
Buckley
1. (3 points) Give the chemical symbol for the neutral element that corresponds to each of
the following electron configurations.
a. 1s22s22p4
________________
b. 1s22s22p63s23p64s2 ______________________
c. 1s22s22p63s23p64s23d104p65s1 _____________________
2. (3 points) Give the number of valence electrons for each of the elements in Question 1.
a.
_________
b. __________
c. ____________
3. (3 points) For each of the elements in Question 1, state whether it is a metal or a
nonmetal.
a. ______________
b. ________________
c. _______________
4. (3 points) For each of the electron configurations in Question 1, state every one of the
classifications that applies from the list: alkali metal, alkaline earth metal, chalcogen,
halogen, noble gas, main group element, transition element, inner transition element. Not
all classifications will be used and some classifications may be used more than once.
a. ________________________________________________________
b. ________________________________________________________
c. ________________________________________________________
5. (9 points) Complete the following table.
Species
75
33
34
16
90
38
Protons
Neutrons
Electrons
As
S 2
Sr 2 
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6. (2 points) Niels Bohr explained the line spectrum as shown below (not shown very well
on a black and white document, but you get the idea). Briefly give his explanation as to
the origin of the discrete lines seen in atomic spectra. You might consider things like
why do we only see a few lines, what do they correspond to, and what new idea does this
introduce to our understanding of the atom.
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