The answer is d noble gas because the very last column on the periodic table is all the noble gases
The answer is C a combustion’s reaction
Answer:
The chemical compounds of living things are known as organic compound because of their association with organisms and because they are carbon-containing compounds, which are the compounds associated with life processes, are the subject matter of organic chemistry
The answer is 1/16 because pretend you have a whole pie and every time you slice it, you cut it in halves...so therefore O is the whole pie, after the 1st half there's 1/2, after the second half life there is 1/4, after the third half life there is 1/8 and after the fourth half life you have 1/16 left. Hope I made it clear enough.