What is a Period on the Periodic Table of Elements?
A period on the periodic table is a horizontal row, and each one represents a new principal energy level for electrons. They have varying numbers of elements, but all elements in a period have the same number of atomic orbitals.
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Think of a period as a row in your high school cafeteria, but instead of lunch trays, it's filled with elements.
Periods on the periodic table are like the lines on your favorite notebook, except they're chemical! Each row = a period, simple as that.
A period is the horizontal line where elements line up like ducks in a row!
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