Players read questions about energy levels and score points by picking the correct element as the answer. Electrons are in regions around the nucleus that are different distances away from the nucleus ...

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 ...

The periodic table was arranged by atomic mass, and this nearly always gives the same order ... The idea behind the explanation is that when an electron falls from a higher energy level to a lower one ...

Substances have both physical and chemical properties. Developing the periodic table The periodic table was developed by grouping elements with similar properties. This, together with a later ...

As you move from left to right across the periodic table, atoms have more electrons in their outer energy level and more protons in their nucleus. The greater attraction between the increased ...