Question

The element Tin (Sn) has 18 different isotopes. Which of the following is true about ALL of these isotopes?

A. They all have the same number of protons
B. They all have the same number of neutrons
C. They all have different chemical properties
D. They all have the same atomic mass

Answer 1

All isotopes have different number of neutrons and hence different atomic masses. Also they have the same electronic configuration and since the chemical properties are determined by this configuration, they all have the same chemical properties; therefore the answer is C)The all have the same number of protons.