What is the most stable monatomic ion formed from caesium?

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?

How many moles of bromine are needed to produce 3.23 moles of potassium bromide

What is the number of neutrons in an atom with atomic mass of 35