elements, isotopes & relative atomic mass

• what is the smallest element?

  hydrogen
• what determines what element the atom is?

  the number of protons
• what are isotopes?

  different forms of the same element, that have the same number of protons, but a different number of neutrons
• how do isotopes react chemically?

  the same way
• what is the relative atomic mass?

  the average mass of all the isotopes that make up an element
• what does abundance mean?

  how common or rare
• what is the equation for relative atomic mass?

  (isotope abundance x isotope mass)(isotopes abundance x isotope mass)

  __________________________

  abundance of all isotopes