1. The nucleus of an electrically neutral iron atom contains 26 protons. How many electrons does this iron atom have? 2. Evidence for the existence of neutrons did not come until many years after the...

1. The nucleus of an electrically neutral iron atom contains 26 protons. How many electrons does this iron atom have?

2. Evidence for the existence of neutrons did not come until many years after the discoveries of the electron and the proton. Give a possible explanation.