Can someone please help me

What is the chemical formula of the following compound

Determine the energy released per kilogram of fuel used. given mev per reaction, calculate energy in joules per kilogram of reactants. consider 1 mole of tritium plus 1 mole of deuterium to be a mole of “reactions” (total molar mass = 5 grams).

Which of the following elements would you expect to have the lowest ionization energy value? fluorine, lithium, neon, nitrogen