Multiple Choice
Which region of the periodic table contains elements with a partially filled f sublevel?
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2. Atoms & Elements
Periodic Table: Classifications
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Which classification best describes the element Ar (argon) in the periodic table?
A
Halogen
B
Alkali metal
C
Transition metal
D
Noble gas
Verified step by step guidance1
Identify the position of argon (Ar) on the periodic table. Argon is located in Group 18, which is the last group on the right side of the table.
Recall the classification of elements based on their group: Group 1 contains alkali metals, Group 17 contains halogens, Groups 3-12 contain transition metals, and Group 18 contains noble gases.
Understand the properties of noble gases: they are inert, have full valence electron shells, and are generally unreactive compared to other groups.
Compare argon's properties and position with the given options: it is not an alkali metal (Group 1), not a halogen (Group 17), and not a transition metal (Groups 3-12).
Conclude that argon fits the classification of a noble gas because it is in Group 18 and exhibits the characteristic properties of noble gases.
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