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 ...

Discover the history, structure, and importance of the periodic table of elements, from Mendeleev’s discovery to modern scientific applications. When you purchase through links on our site ...

Currently, there are 118 known elements on the periodic table, from hydrogen all the way to oganesson, which was officially ...