1 Consider the first atom of each part of the molecule. An atom with higher atomic number has higher priority. (e.g. I > Cl > C > H)  If the first atom of two groups is the same, consider the second atom(s) in the same way as the first. (e.g. -C(CH3)3 > -CH(CH3)2 > -CH2CH3 > -CH3).
1 You can also use a toilet plunger on your bathroom sink. 2  Fill up the sink with water first, the use the plunger vigorously on the drain just as you would a toilet. 3  This will lift and agitate any blockage in the drain. It will smell a bit like vinegar for about a day. 2  You can also use a toilet plunger on your bathroom sink. 3  Fill up the sink with water first, the use the plunger vigorously on the drain just as you would a toilet.
1 A drain stick is effective at clearing clogs in a P-trap or S-trap caused by hair. 2  A plunger can clear a clog if the blockage isn't too far into the pipes. 3  Cleaning out a sink trap removes clogs caused by buildup â such as soap or grease â or a foreign object â such as a toy. If there is a strainer over the drain, as in a tub or shower, remove the screws securing it and pry it up with a screwdriver. 2  Be careful to keep the screws from falling down the drain. 3  You can remove some pop-up sink stoppers by twisting and lifting them out.