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GOB Chemistry 1 Midterm - Part 2 of 5
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Problem 1
Problem 2
Problem 3
Problem 4
Problem 5
Problem 6
Problem 7
Problem 8
Problem 9
Problem 10
Problem 11
Problem 12
Problem 13
Problem 14
Problem 15
Problem 16
Problem 17
Problem 18
Problem 19
Problem 20
Problem 21
GOB Chemistry 1 Midterm - Part 2 of 5
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2. Atoms and the Periodic Table / Electron Arrangements / Problem 20
Problem 20
Determine the group number of bromine. Provide the number of electrons each of its shells holds and the electron configuration in its valence shell.
A
Bromine is in Group 7A.
Shell number 1 contains 2 electrons.
Shell number 2 contains 8 electrons.
Shell number 3 contains 18 electrons.
Shell number 4 contains 7 electrons.
The electron configuration of the valence shell of bromine is 4s
2
4p
5
.
B
Bromine is in Group 6A.
Shell number 1 contains 2 electrons.
Shell number 2 contains 8 electrons.
Shell number 3 contains 18 electrons.
Shell number 4 contains 6 electrons.
The electron configuration of the valence shell of bromine is 4s
2
4p
4
.
C
Bromine is in Group 7A.
Shell number 1 contains 2 electrons.
Shell number 2 contains 8 electrons.
Shell number 3 contains 18 electrons.
Shell number 4 contains 7 electrons.
The electron configuration of the valence shell of bromine is 5s
2
5p
5
.
D
Bromine is in Group 6A.
Shell number 1 contains 2 electrons.
Shell number 2 contains 8 electrons.
Shell number 3 contains 18 electrons.
Shell number 4 contains 6 electrons.
The electron configuration of the valence shell of bromine is 5s
2
5p
4
.
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