For elements to have similar physical and chemical properties, what must be true about them?

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.*

What shape would a molecule with two bound groups and two lone pairs have?

Which electron configuration represents the electrons in an atom of sodium in the ground state at stp