What are periods on the periodic table?

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Study for the IMAT Chemistry Exam. Access flashcards and multiple choice questions; hints and explanations included for each question. Prepare effectively for your exam.

Multiple Choice

What are periods on the periodic table?

Explanation:
Periods are horizontal rows on the periodic table. As you move from left to right across a period, electrons are added to the same outer electron shell, so the number of electron shells stays the same for all elements in that row. When a new period begins, a new energy level starts filling. Vertical columns are groups with similar valence electron configurations, while blocks refer to the subshells (s, p, d, f) that are being filled in different regions of the table.

Periods are horizontal rows on the periodic table. As you move from left to right across a period, electrons are added to the same outer electron shell, so the number of electron shells stays the same for all elements in that row. When a new period begins, a new energy level starts filling. Vertical columns are groups with similar valence electron configurations, while blocks refer to the subshells (s, p, d, f) that are being filled in different regions of the table.

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