Solutions to Practice Problems Week 3
Cs |
Metal |
Os |
Metal |
Ge |
Metalloid |
He |
Nonmetal |
I |
Nonmetal |
Al |
Metal |
Isotope→ |
^{18}O |
^{35}Cl |
^{78}Se |
^{26}Al^{3+} |
^{79}Br^{-} |
Protons |
8 |
17 |
34 |
13 |
35 |
Electrons |
8 |
17 |
34 |
10 |
36 |
Neutrons |
10 |
18 |
44 |
13 |
44 |
_{}
_{}
_{}
_{}
Note: There are discernible
spaces between the boxes for s, p and d orbitals. These spaces are necessary to
distinguish the identity of the electrons (the arrows). Without the spaces, the
display cannot be interpreted.
Atom |
Electronic Configuration |
# unpaired |
Orbital |
Sulfur Z = 16 |
_{} |
2 |
3p |
Zinc Z = 30 |
_{} |
0 |
3d |
Niobium Z = 41 |
_{} |
3 |
4d |
Tellurium Z = 52 |
_{} |
2 |
5p |
Given |
Correct |
F: 1s^{2}2s^{2}2p^{5} |
OK |
Mn: [Ar]4s^{2}4d^{5} |
Mn: [Ar]4s^{2}3d^{5} |
Rb: [Kr]5s^{1} |
OK |
N: 1s^{2}2s^{2}2p |
N: 1s^{2}2s^{2}2p^{3} |