Discuss the isotopic masses of the beryllium atom. What is the most common isotope?

1 Answer
Jul 13, 2017

Well for beryllium, #Z=4#.....


And thus there are 4 nuclear protons; and if there are 4 positive nuclear charges there must be 4 negative electronic charges, supplied by 4 electrons. Now the common isotope is #""^9Be#, which means that commonly, the element contains 5 massive, NEUTRAL particles, 5 neutrons. The atomic mass of the nuclide is, as always, THE SUM of the #"the sum of the noocoolar particles"# to a good first approximation.