Multiple Choice
What is the name of the element with 82 protons (atomic number )?
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4. Atoms and Elements
Periodic Table: Element Symbols
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Which element is located in Group 2 (alkaline earth metals) and Period 3 of the periodic table?
A
Magnesium (Mg)
B
Calcium (Ca)
C
Sodium (Na)
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, which is known as the alkaline earth metals. This group contains elements that have two electrons in their outermost shell.
Locate Period 3, which is the third row from the top of the periodic table. Elements in this period have three electron shells.
Find the element that is both in Group 2 and Period 3 by looking at the intersection of the second column and the third row on the periodic table.
Compare the options given (Magnesium, Calcium, Sodium, Aluminum) with the element found at Group 2, Period 3 to determine the correct answer.
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