Cadmium, atomic number 48, consists of eight naturally occurring isotopes. Do you expect any of the isotopes to have the mass listed on the periodic table? explain your answer.​

Which metals are called noble metals

The solid xy decomposes into gaseous x and y: xy(s) m x(g) + y(g) kp = 4.1 (at 0 °c) if the reaction is carried out in a 22.4 l container, which initial amounts of x and y will result in the formation of solid xy?

Who discovered a pattern to the elements in 1869?