Which of the following statements are TRUE of isotopes?

I. Isotopes of an element have the same chemical properties because they have the same number of electrons
II. Isotopes of elements are normally separated using physical properties
III. Isotopes of an element have the same number of protons in their nuclei

A. I and II only
B. I and III only
C. II and III only
D. I, II, and III

Correct Answer:

Option B – I and III only