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.
Bathroom and kitchen sink faucets account for 19% of the water used in an average home. Federal Plumbing Standards now specify that kitchen faucets use no more than 2.5 gallons per minute (GPM) and bathroom faucets use no more than 2.2 GPM, though several use less quite effectively. You can save up to 40% of the water used by sink faucets replacing your older faucet aerators with new water efficient ones.