Answer:
29
Explanation:
We are given that
An element has 29 protons.
Number of protons=29
We have to find the atomic number of copper.
We know that
Atomic number of an element:
Atomic number is defined as the number of protons of an element.
It is represented by Z.
Number of protons=Atomic number =Z
Therefore, Atomic number of copper=Z=29
Answer: 29
