What is true of all matter? * A. It has mass
B. It can be seen
C. It exists only as a solid
D. It maintains its shape and size

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