helium造句

GIANT inflatable helium balloons.

However, there is a very attractive reaction between deuterium and a light isotope of helium known as helium-3.

If helium loses on electron, what do we have?

Most big balloons are now filled with helium.

We have a helium nucleus and one electron.

It also bodes ill for the prospect of fusion using helium-3, a rare helium isotope that is missing a neutron.

The pebble has about a one millimetre microsphere diameter. The coolant is in fact helium.

And then we have gas cooled reactors which can use supercritical carbon dioxide or helium.

Liquid helium is most frequently provided to customers in a liquid container.

The 40 liter container under pressure of 150 atmospheres contains 6 cubic meters of helium.

Some of this energy congealed into particles, which assembled into light atoms like hydrogen and helium.

He also invented the Skyhook, an air rescue system that involved an airplane and a large helium balloon.

To begin with, the laser palette was rather limited: helium-neon and ruby lasers emitted red light, and others produced invisible infrared.

The adventurer, aged 37, strapped 54 industrial strength helium balloons to his gondola and crossed the 22-mile waterway to the continent

Even if they are hit, though, they do not explode because the helium gas that keeps them airborne is not flammable.

The next heaviest element in the periodic table, the inert gas helium, is used for detecting cracks in pressure vessels and the like.

Inert helium, unlike hydrogen, is safer, but hydrogen has to be used for record launchings because of its greater lifting capacity.

Versus looking at, for example, helium or neon or argon, these are all inert gases, inert meaning essentially do not react, those were grouped together in the periodic table.

Just as in the sun, the chain reaction in the second stage fuses the hydrogen atoms into heavier helium atoms and releases vast amounts of energy in the process.

Similarly we see as we go down the table, so as we're going from one row to the next row, so, for example, between helium and lithium, we see a drop; the same with neon to sodium, we see a drop here.