Use what you have learned about Lewis structures and formal charges to predict which of the following selenium-containing molecule(s) would be least likely to exist. A) SeO2 B) SeO3 C) SeF3 D) SeF4 E) SeF6

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.

20 drops hope this