When valency of calcium is 2 what will be the valency of cacl2?

How are countries protecting themselves from tsunamis? What is the negative impact of ozone layer depletion in construction and architecture? What caused global winds to separate into three bands? Why do some furits have a fleshy pulp around the seeds? How is rubbing alcohol used to cool things down? Alll of the following describes a chemical change except? Is DNA effective in identifying persons? What stage will a thunderstorm cause severe flooding? Is PH of matter a chemical or physical properties? What do microbes look like? Is rubidium mallebility? The chemical reaction that occurs when a mixture of gasoline and air is ignited by a spark is called a? How many deaths occured on mount vesuvius volcanic eruption? How does tellurium become an ion? Why does the ether precipitate when the alcoholic reaction mixture is poured into water? Who are Louis Pasteur and claude bernard? Why do you centrifuge your DNA sample saline solution? Can you use hairspray on a balance beam to make it less slippery? What did jj thomas discover? What was a physical feature found in Canaan?