What is the hybridization of the central atom in becl2?

List the two type of transporst that the cell in orde to transport molecules acroos the membrane

Can someone me with 6 to 10 plz this is for masteries test.

Which theory was contradicted by experiments with the photoelectric effect? light spreads out after it passes through a small opening. as soon as light strikes metal, electrons will be ejected. visible light, regardless of color, will cause the ejection of electrons when striking metal. the kinetic energy of ejected electrons depends on the frequency of light that strikes the metal.