Which of These Pairs Consists of Isoelectronic Species

question 98

Multiple Choice

Which of these pairs consists of isoelectronic species?

• A) Zn²⁺ and Cu²⁺
• B) Cl^- and S
• C) Na⁺ and K⁺
• D) Mn²⁺ and Ar
• E) K⁺ and Cl^-

---

Definitions:

Factor X

An element, influence, or set of circumstances that contributes to a result or outcome.

Selection Bias

A distortion in statistical analysis resulting from the method of collecting samples, leading to an unrepresentative sample and misleading results.

Cohort Study

An observational study in which a defined group of people (the cohort) is followed over time to study the incidence of disease or various outcomes.

Asbestos

A group of naturally occurring fibrous minerals known for their resistance to heat, chemicals, and electricity, historically used in construction but hazardous to health.