Build your practice set
Find exactly what you need to practice.

Search across chemistry topics, concepts, chapters, and questions.

Viewing Shared Question View All Feed
Verified Answer & Explanation⌄

Correct Answer: D) Zr

Concept Explanation

[Kr] accounts for 36 electrons; 5s²4d² adds four more, giving atomic number 40, which is zirconium (Zr).