Chemistry: The Central Science (13th Edition)

Published by Prentice Hall
ISBN 10: 0321910419
ISBN 13: 978-0-32191-041-7

Chapter 8 - Basic Concepts of Chemical Bonding - Exercises - Page 334: 8.11a


The electron configuration of $Si$ is $$1s^22s^22p^63s^23p^2$$

Work Step by Step

To write the electron configuration of $Si$, we would carry out the following steps: 1) Find out the number of electrons in a $Si$ atom: The atomic number of $Si$ is 14, so there are 14 electrons in a $Si$ atom. 2) Put the electrons in the shells and subshells in order of increasing level of energy: - The first 2 electrons would occupy the lowest-level energy subshell $1s$. - The next 2 electrons occupy the next lowest-level energy subshell $2s$. - The next 6 electrons occupy the next lowest-level energy subshell $2p$. - Similarly, the next 2 electrons occupy subshell $3s$. - Finally, the last 2 electrons occupy subshell $3p$. Overall, the electron configuration of $Si$, as a result, is: $$ 1s^22s^22p^63s^23p^2$$
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