One isotope of iron has an atomic number of 26. How many protons are there in its nucleus?
A) The atomic number is not related to the number of protons in the nucleus, which could be any number between 1 and 26.
B) 1 less than 26, or 25
C) 26
D) 56

Question

Quizplus · Accepted Answer

The atomic number of an element is equal to the number of protons in its nucleus. Since the atomic number of iron is given as 26, it means there are 26 protons in its nucleus.

One Isotope of Iron Has an Atomic Number of 26