How many moles are in 3.01*10^23 atoms of mg

Use this information to determine the number of calends electrons in the atoms. which of the following correctly compares the stability of the two atoms? a) both are unreactive b) both are highly reactive c) a is unreactive and d is reactive d) a is reactive and d is unreactive

In salt water solution, the salt is the blank

As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit