True or false: An element has two layers of electrons. The electrons in the outermost layer are called distance electrons. and how many layers

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

Explain the relationship between forward and backward reactions in equilibrium, and predict how changing the amount of a reactant (creating a tension) will affect that relationship.

Why does his teacher ask him to balance the equation by including the correct coefficient