When writing electron configuration the 3d  block comes after the 4s  block.   question 4 options: true false

How many moles of magnesium is 3.01 x10^22 atoms of magnesium?

Using a value of ksp = 1.8 x 10-2 for the reaction pbcl2 pb+2(aq) + 2cl -(aq). if the value of ksp was determined to be only 1.2 x 10-2: too much solid has dissolved. additional precipitate is forming. the solution is unsaturated. the ions are now combining to reduce their concentrations.

Which electron configuration represents the electrons in an atom of sodium in the ground state at stp