Answer:
The atom of carbon weighs more
Step-by-step explanation:
we have
<em>Atom of carbon weighs</em>

<em>Atom of hydrogen weighs</em>

Compare

therefore
The atom of carbon weighs more
A negative and a negative together make a positive so you are basically adding. so you have to find a common denominator which is 8 so you end up with 5/8 + 6/8 = 11/ 8 = 1 and 3/8
Mili is the root for 1000 so 1 gram is 1000 milligrams