Your answer is B because elements within the same column have equal numbers of valence electrons which determines the reactivity of an element.
Answer: 1-Exhale 2-inhale 3-contracted diaphragm 4-relaxed diaphragm.
Step by step explanation: hope this helped! Have a great day.
C. Nickel, hope this helps!
In the Icecaps and glaciers, i hope this helps