Hydrogen

Atom
Molecule

Models of the hydrogen atom

How do scientists determine the structure of atoms, without looking at them? Test the different models by shooting light at the atom. See how the model prediction matches the experimental results.

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Hydrogen molecule

Hydrogen is the chemical element of atomic number 1, represented by the symbol H. It usually occurs in its molecular form, forming the diatomic gas H2 under normal conditions. This gas is flammable, colorless, odorless, non-metallic and insoluble in water.