If two atoms are bonded with a bond energy of 455 kJ, what must be done to break the bond?
A. 455 kJ of energy must be added.
B. The bond will break with no energy added or removed.
C. 455 kJ of energy should be taken from the reaction and put into
the surroundings.
D. The bond order has to go up by one.

some sources quote the lethal dose, for an average 170lbs opiate-naive individual is between 75 and 375 mg

the positions which points up in upward carbon and down in downward carbon are axial

and vice versa holds true for equatorial positions

so the correct answer with labelled diagram will be

c-14 is carbon-14, or radiocarbon.   it is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.