There are unpaired electrons in the lewis symbol for an oxide ion

Describe at least two advantages and two disadvantages of using hydropower as a source of energy.

3.09 lab: reaction of metals 1 which combinations of substances resulted in a chemical change? for each metal that participated in a chemical change, write the type of metal it is, based on your examination of the periodic table. were there any metallic compounds that did not react with either the acid or the base? write the type of metal, based on your examination of the periodic table. make a general statement about the reactivity of the metals in this experiment.

What does a numerical subscript following an element in a chemical formula mean?