5. State the electron configuration for each of the following. Note: the ions either add electrons (if negative) or subtract electrons (of positive) from the basic neutral electron configuration of the element.

Question

a. H
b. C
c. Br
d. O
e. N
f. Na
g. Kr
h. Ag
i. Ba
j. Po
k. U
l. Na+
m. Br-
n. Bh
o. Uuo

Answer 1

a. H: 1s^1
b. C: 1s^2 2s^2 2p^2
c. Br: 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^5
d. O: 1s^2 2s^2 2p^4
e. N: 1s^2 2s^2 2p^3
f. Na: 1s^2 2s^2 2p^6 3s^1
g. Kr: 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^10 5p^6
h. Ag: 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^9
i. Ba: 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^10 5p^6 6s^2
j. Po: 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^10 5p^6 6s^2 4f^14 5d^10 6p^4
k. U: 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^10 5p^6 6s^2 4f^14 5d^10 6p^6 7s^2 5f^3 6d^1
l. Na+: 1s^2 2s^2 2p^6
m. Br-: 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6
n. Bh: 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^10 5p^6 6s^2 4f^14 5d^10 6p^6 7s^2 5f^14 6d^5 7p^1
o. Uuo: 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^10 5p^6 6s^2 4f^14 5d^10 6p^6 7s^2 5f^14 6d^10 7p^6 8s^2