C is your answer. Because if you add two of them together you get a compound.
Answ????
Explanation:
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All elements are pure substances.
Answer:
A radical is a group of atoms of elements carrying a charge, e.g., chlorate [ClO3–]. Radicals or ions are formed by losing or gaining electrons. When an electron is gained the group of atoms acquire a negative charge and is called a negative radical or negative ion.
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