Transition metals, row 4, column 7.
CuL2 is not found on the periodic table as a stand-alone element. It likely refers to a compound where Cu represents the element copper and L represents a ligand that is attached to the copper atom. This compound would be a coordination complex, not an individual element on the periodic table.
The periodic table contains elements only. Copper Sulfate is a compound. There are millions of compounds and thus a table that listed them all would be unwieldly to say the least and totally impractical.
In the right corner of the periodic table.
Copper is a non-ferrous metal because it is not made of iron.
Copper is an element that is in the same family as gold and silver. All of these metals are in the same group on the periodic table. Because of their similarities in structure, these metals have similar properties
If the xkcd periodic table was used to create a new element, it would likely be a fictional or humorous element, as the xkcd periodic table is not based on scientific accuracy.
The number of electrons is not the key factor in determining an element, because ions can have more or fewer electrons. However, assuming an element that hasn't gained or lost any electrons, the element would be Copper.
if by brothers and sisters you mean which elements have similar propertys then you only need to look at the column on the periodic table that copper is in. which would be silver and gold.
Elements in the periodic table that are similar to sulfur would be oxygen, and selenium
If you're asking what element is number 17 on the periodic table the answer is Chlorine. Assuming this is for a chemistry class you should have a periodic table available to you and that would be rather easy to look up.
It would be the 10th element in the periodic table, Neon.
Element X would most likely be found in the alkali metal group on the far left of the periodic table.