What element has the lowest density?

Question

What element has the lowest density? and please include the name and density of the element. Thanks

Answer 1

Hydrogen, 0.09

Answer 2

This question is not so straightforward. Are you talking about elements in general? Then the answer is hydrogen because hydrogen atom has the smallest number of proton, and electron. The isotopes hydrogen also involve various number of neutron.

Or are you talking about the substance that is made of the element?

The substance needs to be specified in terms of its state of matter (gas, liquid, solid). You need to compare the substance in each of these states under the same conditions (temperature, pressure, etc). That been said, usually hydrogen (gas, or H2 molecule) is the lightest substance under stardard temperature and pressure.

Answer 3

Hydrogen has one of the highest energy density values per mass. Its energy density is between 120 and 142 MJ/kg. This means that for every 1 kg of mass of hydrogen, it has an energy value of 120-142 MJ. It is highly flammable, needing only a small amount of energy to ignite and burn. Hydrogen burns cleanly. When it is burned with oxygen, the only by products are heat and water.

Answer 4

H ions and if there are no ions any element that is sufficiently rare. Fore example outer space has a density greater than zero. If you want normal pressure and temperature, there is no mach for He next is H2.

Answer 5

the Honda Element

Answer 6

Hydrogen 0.09g/mol

Answer 7

For gaz it is Hydrogen

Answer 8

hydorgen, do a search for the rest yourself

Answer 9

helium

Answer 10

helium