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Chapter 4: Problem 18

Why is barium, Ba, placed in Group 2 and in Period 6\(?\)

Short Answer

Expert verified
Barium (Ba) is placed in Group 2 because it has two electrons in its outermost shell, and in Period 6 because it has six shells of electrons.

Step by step solution

01

Understand the Periodic Table

The structure of the Periodic Table is important for this exercise. The Periodic Table groups elements based on similar properties and atomic structure. Vertically, elements are divided into groups or families, and horizontally into periods. In the Periodic Table, each period represents one new energy level being filled with electrons. Each group represents the number of electrons in the outermost energy level.
02

Understanding Barium's Position

Barium (Ba) is placed in Group 2 because it has two electrons in its outermost energy level, like all Alkaline Earth Metals. Thus, it belongs to Group 2 in the Periodic Table.
03

Understand Periods in the Periodic Table

Periods on the other hand, represent the number of energy levels. Barium (Ba) is placed in Period 6 because it has six energy levels or shells of electrons.

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