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The Periodic Table
and Stuff
Name: ______________
Block: ___
1. How many protons are in each of the following?
a. Be
b. U
c. Mn
2. How many electrons are in each of the following?
a. Na+
b. V3+
c. Fe2+
d. As3-
e. O2-
3. Predict the electron configuration of the following:
a. P
b. Ti
c. Br
d. Sr
e. Ar
f. K
g. Cd
h. Ca
i.
j. Cs
Xe
4. Re-write the electron configurations in question 3 using core notation.
a.
b.
d.
d.
f.
f.
g.
h.
i.
j.
5. Predict the electron configuration of the following ions, using core notation.
a.
c.
e.
g.
i.
HBrTi2+
Mn2+
Fe3+
b.
d.
f.
h.
j.
Sr2+
N3+
N2Ge4+
Ge2+
6. How many valence electrons do the following contain?
a. O
b. P
c. V
d. Ca
e. Xe
f. Cl-
g. I5+
h. Zn2+
O-
j. Tc4+
i.
7. Which elements have the following electron configuration?
a. 1s2 2s2 2p3
b. 1s2 2s2 2p6 3s2 3p3
c. 1s2 2s2 2p6 3s2 3p6 4s2 3d1
d. 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10
e. 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d6
8. How many f subshells have the value n = 3?
9. How many electrons in an atom can have the quantum numbers n = 3, l = 2?
10. How many electrons can be described by the quantum numbers n = 3, l = 3, ml =
1?
11. The electron configuration for the Barium atom is?
12. Give the quantum numbers for the last electron in:
a. Gold
b. Magnesium
c. Iodine
d. Cadmium
13. How many electrons in an atom can have the following quantum numbers:
a. n = 3
b. n = 2, l = 0
c. n = 2, l = 2, me = 0
d. n = 2, l = 0, me = 0, ms = ½
14. Consider the following sets of quantum numbers. Which set(s) represent(s)
impossible combinations?
SET
n
l
ml
ms
A
1
0
1
+1/2
B
3
3
0
+1/2
C
2
1
1
-1/2
D
3
2
-2
-1/2
E
3
1
-2
-1/2
F
2
0
0
-1/2
Use the following to answer questions 15 – 19.
Given the following electronic configuration of neutral atoms, identify the element and
state the number of unpaired electrons in the ground state:
15. [Ar]4s23d4
16. [Ne]3s23p5
17. [Kr]5s24d105p4
18. [Ar]4s13d10
19. [He]2s22p3
20. If n = 2, how many orbitals are possible?
a.
b.
c.
d.
e.
3
4
2
8
6
21. The electron configuration of Indium is:
a.
b.
c.
d.
e.
1s22s22p63s23p63d104s24p64d105s25p15d10
1s22s22p63s23p63d104s24p64d104p1
1s22s22p63s23p64s24p64d105s25p105d1
1s22s22p63s23p63d104s24p64d105s25p1
None of the above.