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13 October, 10:32

Which of the following is a monatomic cation?

A. Fr + <- - I believe this is correct.

B. NH4+

C. Br-

D. OH-

Answers (1)
  1. 13 October, 11:36
    A. Fr+


    A monatomic ion is an ion consisting of exactly one atom. If an ion contains more than one atom, even if these are of the same element, it is called a polyatomic ion. For example, calcium carbonate consists of the monatomic ion Ca²⁺ and the polyatomic ion CO₃²⁻.
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