How do how do you know the number of valence electrons in an atom from the periodic table? user: how do you know the number of valence electrons from the periodic table?

How many moles of sulfur dioxide are produced when 4.38 moles of oxygen completely react with iron (iv) sulfide

The biomedical technique in which a part of the brain is destroyed with electric current is known as a. electroconvulsive therapy b. prefrontal lobotomy c. bilateral cingulotomy d. tardive dyskinesia

Which statement describes the law of superposition? sedimentary rocks were originally in horizontal layers. in horizontal rock layers, each layer is younger than the one below it. rock layers must be in existence before something can happen to them. rocks that are not in horizontal layers were shifted by some geologic event.