Q
QuestionChemistry

What do all of the elements in a given horizontal row of the periodic table have in common?
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Step 2
: Understanding Periodic Table Structure

Elements in a horizontal row of the periodic table are called a "period" or "row". To understand what they have in common, we need to examine their electron configuration.

Final Answer

Elements in a given horizontal row of the periodic table have the same number of electron shells and systematically increasing numbers of electrons in their outermost shell.

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