Assertion: hydrogen | /r/HasProperty | the lightest element
Facets:
value: on the periodic table
type: LOCATION
value: mainly
type: DEGREE
value: in the world
type: LOCATION
Source sentences:
text: With a standard atomic weight of 1.008, hydrogen is the lightest element in the periodic table.
text: There is little free hydrogen on Earth because hydrogen is so light that it is not held by the planet’s gravity.
text: Because H 2 is the lightest element, atmospheric H 2 can readily be lost to space via Jeans escape, an irreversible process that drives Earth's net mass loss.
text: Hydrogen, being the lightest existing gas (7% the density of air), seems to be the most appropriate gas for lifting.
text: Perched in the top left corner of the periodic table, Hydrogen is the world's lightest element.
text: Hydrogen is the lightest chemical element, has the highest heat conductivity, and has the highest coefficient of diffusion of all the gases.
text: Hydrogen is found in the first group and first period in the periodic table, i.e. it is the lightest and first element on the periodic table.
text: Hydrogen is the lightest element.
text: It has a standard atomic weight of 1.008, meaning it is the lightest element in the periodic table.
text: It is the lightest element in the world.
text: With an atomic weight of 1.00794 u, hydrogen is the lightest element and its monatomic form is the most abundant chemical substance, constituting roughly 75% of the Universe's baryonic mass.
text: Hydrogen is the lightest element.
text: Hydrogen is the first element in the Periodic Table mainly because it is the lightest element known to man.
text: Hydrogen is the lightest element on the periodic table and has been used for a variety of purposes.
text: Hydrogen is the lightest element on the Periodic Table.
text: Although hydrogen is the most abundant element in the human body in terms of numbers of atoms of the element, it's only 3rd in abundance by mass, after oxygen and carbon, because hydrogen is so light.
text: Thirteen and a half percent of the atoms in the Earth’s crust are hydrogen (most of this hydrogen is in sea water), but because hydrogen is so light, it makes up only 0.75 percent of the Earth’s crust by weight.
text: Because hydrogen is so light, all atmospheric hydrogen has already evaporated out into space, although it can be created artificially.