what are the 5 lightest elements(science)?

Answer 1

Hydrogen, Helium, Lithium, Beryllium, Boron

In ascending order of weight (so Hydrogen is the lightest)

Answer 2

Lightest Element

Answer 3

The Lightest Elements are the following:
Hydrogen
Helium
Lithium
Beryllium
Boron

Answer 4

The lightest elements are NOT the first five elements of the periodic table at standard temperature and pressure. This would only apply if they were all in the gasseous state, and with the inert gasses, it is difficult to compare them with other elements, because they do not liquify until they are at very cold temperatures, and then helium still exists as a liquid even at near absolute zero.

The density of an element also depends on its molecular structure. For instance, the inert gasses are all monoatomic, whereas other gas molecules (eg oxygen and nitrogen) are diatomic (O2 and N2). This makes Neon, with atomic mass 20.18 lighter than nitrogen, with atomic mass 14, because Nitrogen molecules are diatomic, and its Molecular mass is therefore 28..

Based on molecular masses, the five lightest elements would be:
Hydrogen - MW 2.016
Helium MW 4
Neon MW 20.18
Nitrogen MW 28.02
Oxygen MW 32

Lithium, Berrylium Boron and Carbon miss out, even though their atomic masses are lower, because they are solids.
Next would be fluorine, at MW 38; slightly lighter than Argon at MW 39.95

Answer 5

the lightest element are the ones with fewer number of electrons.so go to the periodic table and check the first 5 element. but the answer to your question is hydrogen, helium,lithium,boron and carbon

Answer 6

At room temperature Hydrogen (H) will be least effected by gravitational forces. Then Helium (He) and so on up the periodic table (H, He, Li, Be, B, C, N...). This is all considering a hard vacuum and standard temperatures as controls.

The "measured" effects of gravity will change if the element in question is buoyant to the surrounding atmosphere or not (with density determined by temperature). For instance, Argon (Ar) will be measurably heavier than Neon (Ne) in an atmosphere of Helium (He); however, if the Neon is cooled considerably, its density will be higher than the Argon and consequentially with have lower buoyancy relative to the Argon, making it sink.

Answer 7

They are, as already listed the first 5 elements of the periodic table:
H, He, Li, Be, B

Answer 8

I believe it would be the ones with a fewest electrons, which are a first 5 in a periodic table. Or it might be an inert gases. Like Argon, Xenon....hmmm good question