What are fixed reference points on the celsius thermometer

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?

Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li

Which diagram shows the correct way to represent an ionic compound of magnesium oxide?