Transition metal oxides, typically composed of sodium, oxygen, nickel, iron, and manganese, exclude cobalt, addressing sustainability concerns that have plagued lithium-ion batteries. Prussian ...

When the alkali metals are cut, they initially appear shiny grey but quickly become dull and white as they react with oxygen in the air. This is known as tarnishing. Sodium tarnishes more quickly ...

The atom with eight protons in its nucleus (atomic number 8) is oxygen. Each energy level holds a certain number of electrons before ... After the second level has 8 electrons, the next electron goes ...