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QuestionChemistry

Using a periodic table, write the full electron configuration of bromine (Br) so that all the subshells in each principal energy shell are grouped together.
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Step 1:
I'll solve this problem step by step, following the specified LaTeX formatting guidelines:

Step 2:
: Determine the atomic number of bromine

- From the periodic table, bromine (Br) has an atomic number of 35 - This means bromine has 35 electrons that need to be distributed in electron orbitals

Step 3:
: Fill electron orbitals systematically using the Aufbau principle

1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 4s^{2} 3d^{10} 4p^{5}
- Start with the lowest energy subshells and fill them in order - The electron configuration will follow this sequence:

Step 4:
: Break down the electron configuration

- $$4p^{5}$$: Fourth shell, p subshell (5 electrons)
- 2s^{2} 2p^{6}: Second shell, s and p subshells (8 electrons)

Final Answer

1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 4s^{2} 3d^{10} 4p^{5}