In what separation technique is a vapour passed through a condenser, where the gas cools back into a liquid?

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

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?

Which statement about enzymes is true