Pickles are preserved in a solution of salt and acid (usually vinegar). This will corrode common metals which will result in a leaky container and possibly a toxic dose of the metal to the pickles. If your pickle container was made out of gold, platinum or some other very unreactive metal, this wouldn't be a problem, however, this is not usually economically feasible. Hence pickles are commonly stored in plastic containers. Which property of the plastics makes the storage of pickles possible?

The atomic radius of sodium is 186 pm and of chlorine is 100 pm. the ionic radius for na+ is 102 pm and for cl– is 181 pm. in going from na to cl in period 3, why does the atomic radius decrease while the ionic radius increases? a. the inner electrons in the sodium cation shield its valence electrons more effectively than the inner electrons in the chloride anion do. b. the inner electrons shield the valence electrons more effectively in the chlorine atom than in the chloride anion. c. the outermost electrons in chloride experience a smaller effective nuclear charge than those in the sodium cation do. d. the outermost electrons in chloride experience a larger effective nuclear charge than those in the sodium cation do. e. monatomic ions are bigger than the atoms from which they are formed.

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains