What is the photoelectric effect? A the emission of electrons from a metal caused by light striking the metal B the absorption of particles by a metal surface that is exposed to red light or infrared rays C the ability of specialized photons to bounce off a metal surface. D the proportional relationship between a photon’s energy and the frequency of light.

1) these are barrel shaped microtubules in most animal cells, that organize the spindles during cell division

Calculate the number of molecules present in 0.750 mol of mgo.

The table lists the lattice energies of some compounds. compoundlattice energy (kj/mol)lif            –1,036licl            –853naf            –923kf            –821nacl            –786which statement about crystal lattice energy is  best  supported by the information in the table? the lattice energy increases as cations get smaller, as shown by lif and kf. the lattice energy increases as the cations get larger, as shown by lif and licl. the lattice energy decreases as cations get smaller, as shown by nacl and naf. the lattice energy decreases as the cations get smaller, as shown by naf and kf.