Answer
what is the correct iupac name for ? the above pic

Explanation:

1.  Identify and name the longest continuous chain of carbon atoms ( in red: pentane).

2. Replace the -ane ending of the alkane with -ene to get the base name pentene.

3. Number the carbon atoms from the end closest to the double bond.

4. Locate the double bond by using the lower-numbered of its two carbon atoms. Insert the number of the locant just before the -ene. Use a hyphen to connect numbers and letters. The parent name is pent-1-ene.

5. Locate and name the substituents.

There are two one-carbon sidechains (blue bonds: methyl groups) on C3.

Each substituent receives its own number: 3-methyl. Numbers are connected to letters by hyphens

Use a multiplying prefix to indicate the number of methyl groups (dimethyl) and connect numbers to numbers by commas (3,3-dimethyl).

6. Attach the names of the substituents to the front of the parent name.

The correct IUPAC name is 3,3-dimethylpent-1-ene.

Note: The name is acceptable, but the Preferred IUPAC Name puts the locants as close as possible in front of the groups they locate.

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.