Place the following elements in order of increasing ionization energy. Their elemental symbols are listed below. Argon (Ar), Magnesium (Mg), Phosphorus (P), and Chlorine (CI)

A. Mg, P. CI, Ar

B. Ar, CI, P, Mg

C. CI, P, Ar, Mg

D. Not enough information is given

__can be defined as which velocity changes

An atom of sodium-23 (atomic number = 11) has a positive charge of +1. give this information, how many electrons does it have? how many proteins and neutrons does this atom have

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