The properties you described—highly conductive, highly reactive, soft, and lustrous—suggest that the element most likely belongs to the alkali metals group (Group 1) of the periodic table, not the noble gases (Group 18). Alkali metals are known for their high reactivity, softness, and ability to conduct electricity. If you have specific examples in mind or further questions, feel free to ask!
Atomic number quick check
an element is highly conductive, highly reactive, soft, and Lustrous. The element, most likely belongs to which group?(a) Noble gases
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