The reaction diagram illustrates what type of reaction? a.)exothermic b.)endothermic

The answer will be B that is endothermic reaction.

The above image is an example of endothermic reaction as the energy of product is more than that of reactant that is energy is absorbed. In endothermic reactions energy is absorbed while in exothermic reaction, energy is released.

So here the answer will be B that is endothermic reaction as here energy of product is more than reactant .

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.