Mercuric oxide is made up of the elements mercury and oxygen. Could a chemist break down mercuric oxide into simpler substances?

Alpha particles have positive charge, beta particles have negative charge, and answer 4 just doesn’t make sense. thus, you are left with only one possible answer.

It will fall off and tip over. 

There is no reason to think the results are biased or not conducted properly but you should not assume the results are correct just because they were done in a laboratory so the answer would be c. it is likely to be reliable because the results support the conclusion presented.

Aquantity of that isotope to decay to 1/2 of  its original value