determine whether the following molecules are identical, constitutional isomers, enantiomers or diastereoisomers

im not exactly sure but i think its b!

lol for the pointsss

frequency, z, and the collision density, z, in carbon dioxide (co2), r 180 pm at 30 °c and 120 kpa

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.