Isotopes

Isotopes

1. Isotopes are atoms of the same element with different numbers of neutrons

2. Isotopes of the same element have...

   • different masses
   • the same number of protons and electrons
   • Different numbers of neutrons in the nucleus

3. Isotopes are described with two numbers

   • rthe atomic number- the number of protons in the nucleus
   • The mass number- the number of protons and neutrons in the nucleus
   • Different isotopes of an element will have the same proton number but different mass numbers

4. Different isotopes of the same element react in the same way

   • Chemical reactions involve electrons, not neutrons
   • Neutrons make no difference to chemical reactivity