They are particularly good at identifying the position
of light atoms such as hydrogen, oxygen, carbon and nitrogen in samples.
Some fast reactors use oxide fuels, but those made with metallic fuel are even faster, since oxygen is a
fairly light atom.
Superheavy elements — those with atomic numbers higher than 104 — can be produced only by colliding
lighter atoms together.
The details of this decay process are important because, for example, they help to explain the observed amounts of hydrogen and
other light atoms created just after the Big Bang.
Like other «artificial» elements, the nobelium atoms were created by colliding a stream of
lighter atoms with a target.
This process — called «singlet fission» because it is akin to the splitting of atomic nuclei in nuclear fission to create two
lighter atoms from a heavier one — holds promise for dramatically boosting the efficiency of organic solar cells by rapidly converting more of sunlight's energy to electrical charges instead of losing it to heat.
Neutrons are more sensitive to
light atoms like hydrogen and carbon than x-rays.
Measurements of heavy - versus - light variants of elements in the Martian atmosphere indicate that much of Mars» early atmosphere disappeared by processes favoring loss
of lighter atoms, such as from the top of the atmosphere.
Fusion is the process of generating energy by melding together
light atoms; it requires heating the fusion fuel (hydrogen isotopes) to tens or hundreds of millions of degrees.
By fusing together the nuclei of two
light atoms, or by splitting a heavy atom in a process called fission, we can release some of this binding energy.
An intelligence knowing all the forces acting in nature at a given instant, as well as the momentary positions of all things in the universe, would be able to comprehend in one single formula the motions of the largest bodies as well as
the lightest atoms in the world, provided that its intellect were sufficiently powerful to subject all data to analysis; to it nothing would be uncertain, the future as well as the past would be present to its eyes.