Which of the Following Atoms or Ions Is Isoelectronic with Be²⁺

question 99

Multiple Choice

Which of the following atoms or ions is isoelectronic with Be²⁺?

• A) Na⁺
• B) Br^-
• C) He
• D) Xe
• E) He⁺

---

Definitions:

Surge of Excitement

An intense, sudden feeling of exhilaration or euphoria, often experienced in response to a stimulating event or anticipation of one.

Unconditioned Stimulus

In classical conditioning, an unconditioned stimulus is something that naturally and automatically triggers a response without any learning needed.

Conditioned Stimulus

A formerly neutral signal that, once linked with the unconditioned stimulus, ultimately induces a conditioned reaction.

Unlearned Reaction

An innate response or reflex that is not acquired or learned through experience but is naturally present from birth.