abbytristan3594 abbytristan3594 03-11-2017 Chemistry contestada How reactive is an atom of Sodium(Na) and why? Question 1 options: Sodium (Na) is not very reactive because it does not have a full valence shell. Sodium (Na) is not very reactive because it can only bond with Chlorine (Cl) to become salt. Sodium (Na) is very reactive because it does not have a full valence shell. Sodium (Na) is very reactive because it does not have enough protons in the nucleus.