Multiple Choice Question (MCQ)

Question: What is the atomic number of copper?
A. 30
B. 29
C. 28
D. 31
Correct Answer: 29
Explanation

Copper is a chemical element with the symbol Cu and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pinkish-orange color.