Explore BrainMass

# Energy Shell

Not what you're looking for? Search our solutions OR ask your own Custom question.

This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

For the following atoms in their ground state, determine the number of electrons in each energy shell. If there are no electrons in the particular energy shell, leave that answer box blank.

https://brainmass.com/chemistry/general-chemistry/energy-shell-615376

## SOLUTION This solution is FREE courtesy of BrainMass!

In the question there are four atoms with different numbers of electrons listed. The maximum number of electrons that can occupy a specific energy level can be found using the following formula: Electron Capacity = 2n^2. The "^" symbol denotes a superscript and n is the Energy Shell number.

Please note that the energy shell need not be completely filled before electrons begin to fill the next shell. For this question, lets assume that each energy shell gets filled to the maximum before the next shell starts to be filled. Otherwise, you should use a Periodic Table of Elements to check a specific Atom's electron configuration. This lets you know exactly how many electrons are in each level.

Using the above equation, the capacity of the first four energy shells are:

Energy Shell 1, 2 Electrons
Energy Shell 2, 8 Electrons
Energy Shell 3, 18 Electrons
Energy Shell 4, 32 Electrons

To answer your question, you have four atoms that hold 6, 10, 13 and 20 electrons. Again, assume that the lowest energy shell is filled before moving to the higher energy shell.

6 Atom: 2 electrons in Energy Shell 1, 4 Electrons in Energy Shell 2, 0 electrons in Energy Shell 3, 0 electrons in Energy Shell 4 (2+4=6)
10 Atom: 2 electrons in Energy Shell 1, 8 Electrons in Energy Shell 2, 0 electrons in Energy Shell 3, 0 electrons in Energy Shell 4 (2+6=8)
13 Atom: 2 electrons in Energy Shell 1, 8 Electrons in Energy Shell 2, 3 electrons in Energy Shell 3, 0 electrons in Energy Shell 4 (2+8+3=13)

Each Energy Shell is composed of a set amount of subshells.
Each s subshell holds at most 2 electrons
Each p subshell holds at most 6 electrons
Each d subshell holds at most 10 electrons
Each f subshell holds at most 14 electrons
Each g subshell holds at most 18 electrons
Energy Shell 1 has 1 s subshell, Energy Shell 2 has 1 s and 1 p subshell, Energy Shell 2 has 1 s, 1 p and 1d and so on for increasing Energy Shells.
Energy shells are filled according to the Aufbrau principle, until you get to 18. After which, the Madelung rule applies. At that point, electron filling is a bit more complex. To help visualize, you should look here: https://www.wyzant.com/resources/lessons/science/chemistry/electron_configuration