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.

Fugu, also known as puffer fish, is a sushi delicacy that can also be lethal. puffer fish contain a powerful toxin that can kill an adult a few hours after ingestion. sushi chefs who prepare fugu must be specially trained because any contamination of the toxin-free areas of the fish can be deadly. recently this toxin has been put to good use, as scientists have discovered that a purified form of it can treat severe pain in cancer patients. this recent scientific discovery would fall under which area of chemistry? applied biochemistry pure organic chemistry pure physical chemistry applied inorganic chemistry

The formation of a solid, also known as a is an indication of a chemical change. precipitate particulate particle powder

The fact that the total amount of energy in a system remains constant is a(n)