![]() ![]() Periods: The horizontal rows in the periodic table that signify the number of electron shells in an element.Groups: The vertical column of the periodic table that signifies the number of valence electrons in an element.Elements: A pure substance composed of a single atom with a unique atomic number.How to Write Electron Shell Configurations.If you enjoy this article, be sure to check out our others! Related Articles: In addition, you will learn about the different properties of the periodic table groups, periods, and families. We will take a close look at the groups of the periodic table. ![]() 1999‑2023 - All Rights Reserved.In this tutorial, you will learn how to read the periodic table. Retrieved from Ĭopyright © Israel Science and Technology Directory. "Sortable list of elements of the Periodic Table".
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