What does Db stand for in the periodic table?

Classification of microorganism causing disease? What is the opposite of geologist? How would the age of the oldest rocks on the continents compare with the age of the oldest rocks on the seafloor if the rock on the continents is continually formed but not removed? Why does the breaker continue to trip until hot wire is disconnected? What is the definition of the word researching? What is a metaphor a million miles away? Who proposed the law of definite proportion? What formula is chlorine dioxide? Why is the lubrication a serous membrane provides important? Why do Ethanol and dimethyl ether have different chemical and physical properties? Which is the average kinetic energy of the atoms of molecules in a substance known as? What substances form from the reaction of hydrogen and chlorine gas? Is Hydro Energy man made or natural? Do all jovian planets have active volcano? What is the system of measurement in which liquid is measured in grams is called? How do volcanoes have a bad effect on earth and on us? How does Ares the Greek God of War feel? Where is the radial pressure point? What is the altitude of dullstroom? How does Siberia's land change as you move west to east?