Answer: The IUPAC name of compound is
6-Ethyl-2-Octene.
Explanation:First of all draw a straight chain of 8 carbon atoms.
Make a double bond between carbon number 6 and 7 numbering from left.
Add ethyl group at position 3 starting from left.
The structure sketched is attached below,
According to rules the longest chain containing a double bond is selected. Numbering is started from the end to which double bond is nearer. So, in our case the double bond starts at carbon 2, hence parent name of compound is 2-Octene. Then the substituent at position 6 is named.
True, if you would like an example look at Indian arrow heads or early architecture all use rocks.
If they are the most stable, it must mean they have a full outer shell. the first shell can only hold 2 so if it only has 2 electrons then it is pretty stable. all other shells after that can hold 8 so if it has 10,18,26,34,42 and etc electrons, it will be stable as well.
hope this helps!
The answer is d if right thx