Atoms of elements on the left side of the periodic table have lower ionization energies than elements on the right. using your knowledge of ions you could infer that ionization energy refers to the energy needed for an atom to- a. lose electrons. b. gain electrons. c. form ionic bonds. d. form covalent bonds.

The ionization energy trend refers to the need of an ion to displace electrons, or lose them.  Your answer should be A, unless I didn't understand the question correctly.

answer:

the reaction is type of combination reaction.

explanation:

on the product side, there are 2 molecules of bonded to fe   which means one atom of fe are combined two molecules of . so, balanced chemical equation becomes :

this reaction follows the reaction type of combination reaction. a combination reaction is defined as chemical reaction in which reactants combines together to form a single product.

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.