UK-GCSE-SCIENCE-CHEM-AT-01
General Certificate of Secondary Education (GCSE) · 10th Grade
A simple model of the atom, relative atomic mass, electronic charge and isotopes
Child standards (5)
- UK-GCSE-SCIENCE-CHEM-AT-01-01describe the atom as a positively charged nucleus surrounded by negatively charged electrons, with the nuclear radius much smaller than that of the atom and with most of the mass in the nucleus
- UK-GCSE-SCIENCE-CHEM-AT-01-02recall the typical size (order of magnitude) of atoms and small molecules
- UK-GCSE-SCIENCE-CHEM-AT-01-03describe how and why the atomic model has changed over time
- UK-GCSE-SCIENCE-CHEM-AT-01-04recall relative charges and approximate relative masses of protons, neutrons and electrons
- UK-GCSE-SCIENCE-CHEM-AT-01-05calculate numbers of protons, neutrons and electrons in atoms and ions, given atomic number and mass number of isotopes