Most substances can exist as a solid, liquid or gas ... to the source of the ammonia because hydrogen chloride diffuses more slowly than ammonia. Gas particles move very quickly - particles ...

Some atomic gases can also behave like superfluids ... that can become a superfluid have eluded scientists. Hydrogen is typically impossible to study in liquid form—it becomes a solid at -259°C ...

Although the three states of matter are solid, liquid, and gas, not all substances seem to fit perfectly into one of these groups. Take a look at the substance below and see if you can decide whether ...

Even the icy planets in our solar system such as Neptune, Uranus or Jupiter's moon Europa, might have harboured plastic ice ...

Some atomic gases can also behave like ... a superfluid have eluded scientists. Hydrogen is typically impossible to study in liquid form—it becomes a solid at -259°C (-434°F).