Lesson: Isotopes Chemistry

Students will be able to

• define an isotope in order to identify different isotopes of an element,
• recall that elements can have many different isotopes to explain why the existence of isotopes contributes toward the relative atomic masses of some elements not being whole numbers,
• calculate the relative atomic mass of an element from the relative masses and abundances of its isotopes,
• link the chemical properties of an element to the number of electrons in the outer shell.