In most of its compounds, this element exists as a monatomic cation.
A. F
B. S
C. N
D. Ca
E. Cl
Answer (2)
The answer should be (D) Ca, because all others either occur as diatomic or are anions.
The element that mostly exists as a monatomic cation in its compounds is calcium (Ca), which forms the cation Ca²⁺. The other options, such as fluorine, sulfur, nitrogen, and chlorine, typically form anions rather than cations. Thus, the chosen option is D. Ca.
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