Friction is not related to the efficiency of a machine.

true
false

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true

In 2002, the rare earth elements mine in mountain pass, california was closed because

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.