2007-04-20 20:42:06 · 16 answers · asked by job david 1 in Science & Mathematics ➔ Astronomy & Space
That should be aerogel, the lightest solid known to exist. It's man-made and it's up to 99.5% air, yet it's practical enough to be used for insulation in space probes or to collect comet material in space. It is transparent (with a bluish tint) and feels like styrofoam in touch (as they claim).
2007-04-22 01:19:22 · answer #1 · answered by stardom65 3 · 1⤊ 0⤋
The first isotope of Hydrogen is the lightest material, its called protium. It contains less neutrons than the other two istotopes(deuterium and tritium) which by an incredibly small amount, makes it the lightest.
2007-04-20 21:15:54 · answer #2 · answered by Loki 1 · 1⤊ 0⤋
Hydrogen
2007-04-22 17:59:30 · answer #3 · answered by hilltopobservatory 3 · 0⤊ 0⤋
Hydrogen
2007-04-20 20:45:29 · answer #4 · answered by Anonymous · 2⤊ 0⤋
Hydrogen.
2007-04-20 20:50:55 · answer #5 · answered by Warren D 7 · 0⤊ 0⤋
are you talking about metals? lithium is the lightest one. if you mean elements, it's hydrogen.
2007-04-20 23:51:47 · answer #6 · answered by neutron 3 · 0⤊ 0⤋
That would be element #1 Hydrogen, can you believe it!
2007-04-20 20:49:39 · answer #7 · answered by Anonymous · 0⤊ 0⤋
a bleached feather that is floating in a warm helium breeze, with a huge passing planet near earth orbit.
2007-04-20 20:47:35 · answer #8 · answered by Sincere1 2 · 0⤊ 1⤋
its hydrogen because it has the smallest atomic mass of all the elements
2007-04-20 23:38:47 · answer #9 · answered by mymp guy 1 · 0⤊ 0⤋
A fether
2007-04-20 20:45:11 · answer #10 · answered by ? 2 · 0⤊ 1⤋