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 In a dry sink, pour at least 1 cup of baking soda down the blocked drain, and ensure that the powder makes its way down the drain. 2  Next, pour approximately 2 cups of boiling water in and wait several minutes.3  Add one more cup of baking soda in and immediately follow it with one cup of plain white vinegar. In a dry sink, pour at least 1 cup of baking soda down the blocked drain, and ensure that the powder makes its way down the drain. 2  Next, pour approximately 2 cups of boiling water in and wait several minutes.