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Chapter 6: Problem 30

Write the ground state electron configuration for (a) \(\mathrm{B}\) (b) \(\mathrm{Ba}\) (c) \(\mathrm{Be}\) (d) \(\mathrm{Bi}\) (e) \(\mathrm{Br}\)

Short Answer

Expert verified
Answer: The ground state electron configurations for the given elements are as follows: - Boron (B): 1s² 2s² 2p¹ - Barium (Ba): 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² - Beryllium (Be): 1s² 2s² - Bismuth (Bi): 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 5f¹⁴ 6p³ - Bromine (Br): 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁵

Step by step solution

01

Find the atomic number of Boron

Using the periodic table, we can see that the atomic number of Boron is 5. This means that Boron has 5 electrons in its ground state.
02

Determine the electron configuration using the Aufbau Principle

Following the Aufbau Principle, we fill the subshells in order of increasing energy. The electron configuration for Boron with 5 electrons is: 1s² 2s² 2p¹ #b) Barium (Ba)#
03

Find the atomic number of Barium

Using the periodic table, we can see that the atomic number of Barium is 56. This means that Barium has 56 electrons in its ground state.
04

Determine the electron configuration using the Aufbau Principle

Following the Aufbau Principle, we fill the subshells in order of increasing energy. The electron configuration for Barium with 56 electrons is: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² #c) Beryllium (Be)#
05

Find the atomic number of Beryllium

Using the periodic table, we can see that the atomic number of Beryllium is 4. This means that Beryllium has 4 electrons in its ground state.
06

Determine the electron configuration using the Aufbau Principle

Following the Aufbau Principle, we fill the subshells in order of increasing energy. The electron configuration for Beryllium with 4 electrons is: 1s² 2s² #d) Bismuth (Bi)#
07

Find the atomic number of Bismuth

Using the periodic table, we can see that the atomic number of Bismuth is 83. This means that Bismuth has 83 electrons in its ground state.
08

Determine the electron configuration using the Aufbau Principle

Following the Aufbau Principle, we fill the subshells in order of increasing energy. The electron configuration for Bismuth with 83 electrons is: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 5f¹⁴ 6p³ #e) Bromine (Br)#
09

Find the atomic number of Bromine

Using the periodic table, we can see that the atomic number of Bromine is 35. This means that Bromine has 35 electrons in its ground state.
10

Determine the electron configuration using the Aufbau Principle

Following the Aufbau Principle, we fill the subshells in order of increasing energy. The electron configuration for Bromine with 35 electrons is: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁵

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