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.
Plunge the drain. Use a small, sink size plunger to agitate the clogged-up material. Create a seal and push up and down on the rubber base of the plunger. 1  Plunging works best if you fill the tub or sink with water.2  The added pressure from the water will help force open the clog.. Use gravity and pressure to flush the drain. This works best on a clogged tub, since you can fill the tub with gallons of water. Fill the tub with hot water. Then, open the drain and let the pressure of all that water help break up the clog.