The mixtures of sodium carbonate and calcium nitrate react to precipitate calcium carbonate and sodium nitrate. this reaction is shown by which balanced chemical equation?

An atom of sodium-23 (atomic number = 11) has a positive charge of +1. give this information, how many electrons does it have? how many proteins and neutrons does this atom have

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?

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.