Answer:The answer is D.1,3
Explanation:
When two atoms of the same element are covalently bonded, the radius of each atom will be half the distance between the two nuclei because they equally attract the electrons. The reason for this trend is that the bigger the radii, the further the distance between the two nuclei. Hope this helps:)
Answer:
the last period. i think has the largest energy level
Explanation:
