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Chapter 36: Problem 30

Write the full electronic structure of bromine.

Short Answer

Expert verified
The full electron configuration for bromine is 2-8-18-7 or [Ar] 4s虏 3d鹿鈦� 4p鈦�.

Step by step solution

01

Identify Atomic Number

Locate bromine on the periodic table to identify its atomic number. Bromine's atomic number is 35, which means a neutral bromine atom has 35 electrons.
02

Distribute Electrons in Energy Levels

Start filling up the energy levels/shells with electrons. Remember that the first energy level (n=1) can hold up to 2 electrons, the second level (n=2) up to 8, the third level (n=3) up to 18, and the fourth level (n=4) can hold 32 electrons. Distribute the 35 electrons within these levels as follows: The first energy level gets 2 electrons (n=1), the second energy level gets 8 electrons (n=2), the third energy level gets 18 electrons (n=3), and the fourth energy level gets 7 electrons (n=4).
03

Write the Electronic Configuration

The electronic configuration can be written as the sum of electrons in each energy level. For bromine, it would be 2-8-18-7.
04

Optional - Write the Configuration in Terms of Blocks

Sometimes, electronic configurations are written in terms of blocks (s, p, d, f) instead of energy levels. For bromine, this would be [Ar] 4s虏 3d鹿鈦� 4p鈦�. Here, [Ar] is an abbreviation for the electronic configuration of Argon (previous noble gas), meaning bromine鈥檚 configuration starts where Argon鈥檚 ends.

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