Convert 310 g of Na into atoms of Na

Me i dont know what to do! the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

Why do cells appear different in distilled water than they do in 10% salt water?

Which description best characterizes the motion of particles in a solid?