A laboratory analysis determines that the neutral atom $B$ possesses 18 electrons and 20 neutrons. Two monoatomic ions, $A^{2+}$ and $C^{-}$, are found to be isoelectronic with atom $B$, meaning that all three species contain the identical total number of electrons. Based on this information, which of the following statements accurately compares these species?

A) Species $A^{2+}$ contains 20 protons in its nucleus, whereas species $C^{-}$ contains 17 protons.

B) Species $A^{2+}$ has fewer protons than electrons because it carries a positive charge.

C) Species $C^{-}$ was formed when a neutral atom released one electron to achieve stability.

D) Species $A^{2+}$ and $C^{-}$ belong to the same chemical element because they share the same electron count.

Ions Transitional Reasoning Practice

Chemistry · Atomic Structure · Chemistry · Atoms & Subatomic Particles

1 Chemistry practice questions on Ions. Questions that build towards applied reasoning.

Layout:

Choose how questions appear in the preview and test.

Preview the questions below, then start to answer and see your results.

Answers and step-by-step solutions appear after you finish the test.

Atomic Structure · Chemistry

Choose a topic and keep learning.