A helium tank contains 25.2 L of helium at 8.40 atm pressure. Determine how many 1.50-L balloons at 755 mm Hg can be inflated with the gas in the tank, assuming that the tank will also have to contain He at 755 mm Hg after the balloons are filled (that is, it is not possible to empty the tank completely). The temperature is 25 C in all cases.
Degenerate: orbitals with the same energy Half d orbitals are signiﬁcantly more stable Valence electrons are the electron in the outermost shell (highest energy level) Group 6 and 11: the ones where they subtract an electron from the ground state orbitals and add one to a valence electron to have more stability Metalloids: semi conductivity, highly temp dependent, used in circuits, cellphones, etc. (Ex: Silicon) Metals: good conductors for heat and electricity, malleable, ductile, form cations Non-Metals, poor conductors for heat and electricity, brittle, form anions Atomic Radius: -increase when you go down a group, decrease when you go across a period from left to right -when the number of electrons increase and is added to the same shell, valence electrons are held tighter -vale