Which of the following accurately describes properties of valence? a. nonmetallic elements tend to have a positive valence and tend to be electron borrowers. b. metals tend to have a negative valence and tend to be electron borrowers. c. the greater the number of electrons an atom has to borrow or to lend, the greater the activity of the atom. d. the smaller the number of electrons an atom has to borrow or to lend, the greater the activity of the atom

In which layer of earth do most earthauakes occur a_ inner core b_outer core c_mantle d_crust

After cloud droplets form, what must happen to them for precipitation to occur?

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