Which pair of atoms will form a covalent molecule?
1 atom of copper and 2 atoms of flouride
1 atom of sodium and 1 atom of flouride
1 atom of oxygen and 1 atom of ion
1 atom of oxygen and 2 atom of hydrogen

What are chlorofluorocarbons and what impact do they have on the atmosphere?

What is the thinnest soap film (excluding the case of zero thickness) that appears black when illuminated with light with a wavelength of 480 ? the index of refraction of the film is 1.34, and there is air on both sides of the film. express your answer in nanometers. hint 1. how to approach th

The field between two charged parallel plates is kept constant. if the two plates are brought closer together, the potential difference between the two plates either a) decrease b) does not change c) increase?