Which element has very high reactivity , very good electrical conductivity , and good malleability

Find the protons, electrons and neutrons for strontium with a mass of 83

You are making a solution of calcium chloride dissolved in water. you add solid, stir, and it dissolves. you add just a spatula tip full, stir, and the solid does not dissolve. how could you describe the solutions before and after adding the spatula tip amount

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