Feb 9, 2016
Experiments with mass spectrometry revealed that each of these element forms
had its own distinctive mass. The element forms were called
Kids learn about the science of
A secondary school revision resource for AQA GCSE Additional Science about
radiation, atoms and
Jul 2, 2015
Elements are defined by the number of protons in an atom's nucleus. For example, an atom with 6 protons must be carbon, and an atom with 92 protons must be ...