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.
Most vessel sinks do not include drains since there are numerous finishes available. Ideally you should choose a drain or mounting ring to match your faucet finish, and in a perfect world your faucet finish should match the rest of the accessories in your bathroom like the towel bars, cabinet pulls and door knobs etc. There are two main styles of drains, popup drains and grid drains. A pop up drain is a drain that can be closed to allow the sink to fill with water, it is lifted up or pushed down with your hand.