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Which region of the periodic table contains the most reactive metals?
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2. Atoms & Elements
Periodic Table: Group Names
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Which of the following elements is classified as a halogen?
A
Na
B
Cl
C
Ne
D
Mg
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Recall that halogens are elements found in Group 17 (VIIA) of the periodic table. These elements are known for their high reactivity and include fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At).
Identify the group number of each element given in the options: Sodium (Na) is in Group 1, Neon (Ne) is in Group 18, Magnesium (Mg) is in Group 2, and Chlorine (Cl) is in Group 17.
Since halogens are specifically the elements in Group 17, focus on the element that belongs to this group.
Recognize that Chlorine (Cl) is the only element among the options that is in Group 17, and therefore it is classified as a halogen.
Conclude that the correct answer is Chlorine (Cl) because it fits the definition and position of halogens on the periodic table.
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