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Praxis II Elementary Education: Content Knowledge Exam Prep

Category - Praxis II EE:CK

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In the periodic table of elements, how are groups organized?

Vertically, into columns
Horizontally, into rows
By their abundance
Alphabetically

Explanation

Answer: A - In the periodic table, groups are organized vertically, into columns. A group has the same number of electrons in their outer orbital. From left to right, the number of electrons increases.

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