What is an element that has more valence electrons than fluorine and less energy levels than sodium?

What is the force of attraction between the particles in a salt crystal

Write a paragraph at least 10 sentences explaining how rocks are used today in society

18. use the activity series to predict whether the following synthesis reaction will occur. write the chemical equations for the reaction if it's predicted to occur. (s) + o2(g) -> *note: it is possible.*