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Describe how PERIODS and GROUPS are set up on the Periodic Table of Elements.
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Describe how PERIODS and GROUPS are set up on the Periodic Table of Elements.

User Ugesh Gali
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Answer:

Periods are horizontal rows (across) the periodic table, while groups are vertical columns (down) the table. Atomic number increases as you move down a group or across a period.

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Step-by-step explanation:

User MZHm
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