The overall reaction in a commercial heat pack can be represented as a. how much heat is released when 4.00 mol iron is reacted with excess o2? b. how much heat is released when 1.00 mol fe2o3 is produced? c. how much heat is released when 1.00 g iron is reacted with excess o2? d. how much heat is released when 10.0 g fe and 2.00 g o2 are?

the answer is barium and copper bromide

b.false that your answer

the seeing the electronic configuration we can say that the element is fluorine.

fluorine is the most electronegative element in the periodic table.

but by only seeing the configuration we cannot say about its reactivity because we don't know if its configuration after excitation or by addition of electrons.

but if not then, it is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. as the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine.