A chemical element is one of those squares on the periodic table that adorns many ... are made of protons, neutrons and electrons. It is the number of protons, otherwise known as the atomic ...

Atomic structure - AQA Atoms consist of a nucleus containing protons and neutrons ... can be calculated from its atomic number and mass number. The periodic table - AQA Mendeleev made an early ...

Students look more deeply into the structure of the atom and play a game to better understand the relationship between protons, neutrons, electrons, and energy levels in atoms and their location in ...

Atomic structure - AQA Atoms consist of a nucleus containing protons and neutrons ... calculated from the atom's atomic number and mass number. The periodic table - AQA Mendeleev made an early ...