Can someone explain electron configuration to me cuz im completly lost

What is the maximum number of electrons that an atomic orbital can contain?

List four observations that indicate that a chemical reaction may be taking place

Margaret wants to make an orange flavored drink by stirring powdered drink mix into a glass of water. she doesn't like drinks that have small clumps of powdered solid in them, so she wants the drink to be a perfect solution. what factors should margaret not consider when deciding how much powder to add to her glass of water?