Does anyone know what the name for the "Periodic Staircase" is??

Test Preparation AP Test Preparation
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<p>My teacher said there is a specific name for the “Periodic Staircase” found in the Periodic Table of Elements that separates the Metalloids/semimetals. Does anyone know the name of this “staircase?” Thanks.</p>

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<p>askyahoo.com</p>

<p>lol</p>