Flexibility and brittleness are properties of solids. Because of its very unusual quantum properties (compared to nearly all other elements - hydrogen is weird too) flexibility and brittleness may not really apply to solid helium.
Helium CAN be turned into a solid - but it requires elevated pressures and REAAALLLY low temperatures. Because of quantum effects, it can remain liquid all the way to absolute zero at normal pressures. To get a solid requires pressures above about 2.5 MPa (25 bar) and temperatures down around 1 Kelvin. In theory you could get it solidify at room temperature if you could get it up to a pressure of 114,000 atmospheres (1,675,338 psi) but well before those pressures helium tends to diffuse into whatever solid forms the walls of its container - causing embrittlement, leading to fractures - aaaaannnnnnddddd - POW!
Suffice it to say that at such extreme temperatures flexibility is difficult to measure. At least one experiment found no penetration of a probe 0.6-mm in diameter until the force exerted exceeded 330 dyne - at which point it gradually penetrated the sample at a rate of about 3 µm/sec. As soon as the probe was withdrawn, the indentation "healed" - kind of like rubber rebounding after compression, but in this case it more like the helium flowing back into the depression. Apparently solid helium doesn't so much flex as flow.
Brittleness usually is defined as the response to stresses. As already noted, it sort of flows when subject to compressive stress. Solid helium als behaves strangely under shear stresses. It can be a "supersolid", i.e. a solid exhibiting superfluid characteristics like zero viscosity flow, consequently when placed under shear stress it may decouple from the the shearing surface making any measurements meaningless.
helium is in the family of noble gases according to the periodic table
Hydrogen has atomic number 1 whereas helium's is 2.
The gas constant is the same for all gases: R = 8,314 462 1(75) J/mol.K
Helium doesnot have a gender. It is a chemical element
Helium has 2 valence electrons. Being in Group 18 of the periodic table, helium is a noble gas and has a full outer electron shell.
liquid, and gas.
gaseous state.
Helium is an odorless gas.
Helium's chemical symbol is He.
-268.93 °C
a material that can be hammered or rolled into flat sheets or other shapes
the ductility, mallebility, roughness, texture, color,, smell, taste
helium is a colourless odourless gas
the ductility, mallebility, roughness, texture, color,, smell, taste
the ductility, mallebility, roughness, texture, color,, smell, taste
Helium is a gas at room temperature.
heliums period address is 11.09