Only in a nuclear collider like CERN. It is an element.
Helium is a colourless gas, hence transparent. Please see the link.
Helium itself is colorless, odorless, and tasteless. The color you may see associated with helium balloons is from the material the balloon is made of, not the helium gas itself.
I thought I heard 1% on radio, but would like to see a real citation.
A helium nucleus plus energy released. see the link below
Well, people CAN'T see air, or atoms, or gluons, or electrons, or quarks, or helium, or hydrogen, or ribosomes with the naked eye.
helium is a gas that has no smell or tast and you can not see it
Helium is a colourless gas, hence transparent. Please see the link.
Helium itself is colorless, odorless, and tasteless. The color you may see associated with helium balloons is from the material the balloon is made of, not the helium gas itself.
because we can't see it
See the link below.
Hydrogen, helium, lithium... See a periodic table for the full list.Hydrogen, helium, lithium... See a periodic table for the full list.Hydrogen, helium, lithium... See a periodic table for the full list.Hydrogen, helium, lithium... See a periodic table for the full list.
Helium is the 2nd lightest element and is the 2nd most abundant in the Universe. Most helium was formed during the Big Bang (See Link), but new helium is being created as a result of the nuclear fusion of hydrogen in stars.
No, helium has weight, but it rises when its in an expandable container such as a balloon because it is lighter than the nitrogen rich atmosphere but inside of a rigid container the helium can only add weight. (see the mythbuster's episode about the helium football)
see: http://antihelium.wordpress.com
No. It is a gas because you cannot see it.
I thought I heard 1% on radio, but would like to see a real citation.
Depends on the purpose. But if you combine neon with helium, and obtain a helium-neon laser, you can see that it is much smaller than a xenon laser.