Multiple Choice
Which periodic table group does argon (Ar) belong to?
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4. Atoms and Elements
Periodic Table: Group Names
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Which element would be expected to have chemical properties most similar to calcium (Ca) based on periodic table group trends?
A
Aluminum (Al)
B
Sodium (Na)
C
Magnesium (Mg)
D
Chlorine (Cl)
Verified step by step guidance1
Identify the group (column) in the periodic table where calcium (Ca) is located. Calcium is in Group 2, which is known as the alkaline earth metals.
Recall that elements in the same group have similar chemical properties because they have the same number of valence electrons. For Group 2, this means they all have 2 valence electrons.
Look at the options given and determine which element is also in Group 2. Magnesium (Mg) is in Group 2, while Aluminum (Al) is in Group 13, Sodium (Na) is in Group 1, and Chlorine (Cl) is in Group 17.
Since magnesium (Mg) shares the same group as calcium (Ca), it will have chemical properties most similar to calcium due to similar valence electron configurations.
Therefore, based on periodic table group trends, the element with chemical properties most similar to calcium is magnesium (Mg).
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