Chemistry 5070 · O Level · Atomic structure and the Periodic Table

Atomic structure and the Periodic Table — practice question

Cobalt is a transition element. A cobalt particle has 24 electrons and a nucleon number of 60. Which statement about this particle is correct?

  • AIt is a $3+$ ion.
  • BIt is a $3-$ ion.
  • CIt contains 24 neutrons.
  • DIt contains 24 protons.

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