Chapter 2, Problem 19QRT

Interpretation Introduction

Interpretation:

Strontium $-90$ is a product formed when atomic bombs exploded.  How Strontium $-90$ and Strontium $-88$ differ in terms of the number of subatomic particles has to be identified.

Concept Introduction:

Isotopes have same number of protons and different number of neutrons.  Different isotopes of same element have different number of neutrons, they do not have the same mass because the neutron number is different.

Example:

Isotopes of magnesium are:

  ${}_{\text{12}}^{\text{12}}{\text{Mg , }}_{\text{12}}^{\text{13}}{\text{Mg and }}_{\text{12}}^{\text{14}}\text{Mg}$