Can someone tell me the bohr rutherford diagram of atom for calcium

If 1.8 l of water is added to 2.5l of a 7.0 molarity koh solution, what is the molarity of the new solution

Sally is making a model of a magnesium atom with an atomic mass number of 24 for her chemistry class. she has foam balls for the protons, neutrons, and electrons. she has added 6 neutrons to her model so far. how many more neutrons does she need to add to complete her neutral atom of magnesium?

An atom of which element reacts with an atom of hydrogen to form a bond with the greatest degree of polarity ?