Answer:
the structure of sticks and balls refers to an organic radical, called EThyL.
Explanation:
Ethyl has three main carbons, of which three hydrogen molecules come from the first carbon, two from the second, and three other hydrogen molecules from the third.
The amount of hydrogens to which a carbon can be attached, which according to an organic structure depends on the amount of carbons to which the carbon is attached, a carbon must never exceed 4 bonds.