Which of these steps would most likely be part of a lab procedure?

How many neutrons does a atom of cobalt have?

What is a possible quantum number set for an electron in the 3s orbital of a magnesium atom

How can a give a full method for the experiment of separating sand from water by filtration? 1-materials 2-steps 3-conclusion also for water and salt separated by the evaporation or distillation process