Asolution of na2co3 is added dropwise to a solution that contains 1.23×10? 2 m fe2 and 1.46×10? 2 m cd2 . what concentration of co32? is need to initiate precipitation? neglect any volume changes during the addition.

Write the chemical symbols for three different atoms or atomic cations with 27 electrons. asap!

Which of the following statements is true? a. elements in the last period are radioactive. b. atomic weight is the same as atomic mass. c. elements in the same group have the same number of electron shells. d. atomic number equals the number of neutrons in the nucleus of an atom.

What are the variables in gay-lussac’s law? pressure and volume pressure, temperature, and volume pressure and temperature volume, temperature, and moles of gas