If you were balancing an equation containing the O2 molecule, which of the following would be correct representations of O2 and its coefficient?

a. a primary source combines several different accounts of an event. b. a primary source generally benefits from having been written after an event.

explanation:

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.

you did not give any options thus this is the best answer i can give to you with this little information you have given

> they are both natural and not man made

> they can be tracked and predicted by the right tools

-love shrooms