An isotope has 2 naturally occurring isotopes . X-107 has an abundance of 51.82% and a mass of 106.9 amu. X 109 has a relative abundance of 48.18\% and a mass of 108.9 amu. Calculate the atomic mass. Identify the unknown element . Show work

Which of these reactions are redox reactions? check all that apply. cd + hcl → cdcl2  + h2cucl2  + na2s → 2nacl + cuscaco3  → cao + co2          2zns + 3o2  → 2zno + 2so2          ch4  + 2o2  → co2  + 2h2o

What are the first two quantum numbers for the electrons located in subshell 4d? what are the first three quantum numbers for the electrons located in subshell 2s? how many electrons can be held in a sublevel l = 3? how many electrons can be held in the energy level n = 4? how many electrons in an atom can share the quantum numbers n = 4 and l = 3?

You have a liquid that exhibits diltancy. you want to pour it from a bottle. what should you do to the bottle before pouring