What is the lightest alkali metal with three neutrons?

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?

Consider the elements bromine and chlorine; which elements has a larger ionic radius ?

Why is carbon ideal for making different compounds?