use the bond energies provided to estimate δh°rxn for the reaction below. pcl3(g) cl2(g) → pcl5(l) δh°rxn = ? bond bond energy (kj/mol) cl-cl 243 p-cl 331

Consider the four elements above. which one of these elements will combine with oxygen in a 1: 1 ratio?

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.

Categorize them by metal, nonmetal, in periodic tableductilenon-ductilemalleableoften gain electrons easilygood conductorpoor conductorcan be liquidselements