What is hydrolisation

What is the mass defect of a mole of nuclei with 1.8 x 10^15 j/mol binding energy?

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?

Name the element in group 17, period 2. (periodic table)