Multiple Choice
In the periodic table, what do the horizontal rows (periods) indicate?
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4. Atoms and Elements
Periodic Table: Classifications
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Which element is located in Group 2 and Period 3 of the periodic table?
A
Magnesium (Mg)
B
Sodium (Na)
C
Calcium (Ca)
D
Aluminum (Al)
Verified step by step guidance1
Understand the layout of the periodic table: Groups are the vertical columns numbered from 1 to 18, and Periods are the horizontal rows numbered from 1 to 7.
Identify Group 2 on the periodic table, which is known as the alkaline earth metals group. Elements in this group have two valence electrons.
Locate Period 3, which is the third row from the top of the periodic table.
Find the element that lies at the intersection of Group 2 and Period 3. This element will be in the second column and third row.
Recognize that the element in Group 2, Period 3 is Magnesium (Mg), based on its position in the periodic table.
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