If 200.0 g of copper(ii) sulfate react with an excess of zinc metal, what is the theoretical yield of copper?

Nonmetal halogen family atmoic mass 35

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?

As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit