SANTA BARBARA, Calif.—A company in California has used hydrogen produced from only sunlight and water to generate electricity in a fuel cell. HyperSolar, Inc., the developer of technology to ...

In this diagram of methane (CH₄) the chemical bond between atoms is shown as a stick. One molecule of the compound methane is made from one carbon atom and four hydrogen atoms.

According to the standard model of particle physics, these anti-atoms should absorb and emit light at the same wavelengths as hydrogen.

Establishing the phase diagram of hydrogen is a major challenge for experimental and theoretical physics. Experiment alone cannot establish the atomic structure of solid hydrogen at high pressure ...

In this diagram of methane (CH₄) the chemical bond between atoms is shown as a stick. One molecule of the compound methane is made from one carbon atom and four hydrogen atoms.