Element or Chemical, Atomic Mass or Number

Recently, NPR ran a story on the finding of possibly high levels of antimony in a certain toy.  I did not hear the original piece, but I did hear NPR reading from a listener's letter complaining about NPR's confusing the subtle distinction between "a chemical" and "a chemical element."

So, in the midst of apologizing for calling antimony a 'chemical', the host says that he "sees antimony right there on the periodic table between tin and tellurium, with an atomic mass of 51)"

While retracting on something that probably wasn't wrong in the first place, they make a definite blunder and confuse atomic mass with atomic number.  That's like confusing the number of men at a party with the number of people at a party!  Atomic mass counts protons and neutrons and the average number for antimony is 122.  51 is the atomic number and merely the number of protons.