Why can't helium bond with hydrogen?

Frictional forces acting on an object are often converted into energy, which causes the temperature of the object to rise slightly.

Which of the following electromagnetic waves can create ions?

According to the valence shell electron pair repulsion (vsepr) theory, a molecule that has four electron groups around the central atom will exhibit what electron geometry? view available hint(s) according to the valence shell electron pair repulsion (vsepr) theory, a molecule that has four electron groups around the central atom will exhibit what electron geometry? trigonal bipyramidal tetrahedral square planar determination of electron geometry requires information on whether the electron groups are lone pairs or bonding groups.