It would be difficult to study the physical and chemical properties of the elements.
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.
Mendeleev left blank spaces because certain elements on the Periodic Table were not known at that time. He knew that in the future, those elements would be found and placed on the periodic table.
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 metalloids split the table these are a diagonal group of elements, B, Si, Ge, As, Sb and Te. To their right are the non metals to the left the metals. There are many more metals than any other type of element. See Wikipedia article "Periodic table (metals and non metals)"
Lodine would be classified in the Halogens family in the periodic table, along with elements like fluorine, chlorine, bromine, and astatine. Halogens are highly reactive nonmetals located in Group 17 of the periodic table.
On the far left on the periodic table.
In the right corner of the periodic table.
The periodic table doesn't show grams; and which grams ?
If new elements are placed, then they would be appended in the periodic table. It won't disturb existing periodic table.
The only thing it might mean would be number, but that is usually no. and not NO. NO would be nitrogen oxide (nitric oxide), but that would NOT appear in the periodic table, as it is a compound, and only ELEMENTS appear in the periodic table.
My answer for this would be Colour of the elements.
Elements in the periodic table that are similar to sulfur would be oxygen, and selenium
Oxygen is in the upper right side of the periodic table.
There are 117 elements on the periodic table, however, there is one blank spot that lies on the periodic table of elements, it has the atomic number of 117. If it were discovered, there would be 118 elements on the periodic table of elements.
Periodic table would be complex then. It will make study of elements difficult.
The most common halogen on the periodic table would have to be either chlorine or iodine.
Then there would be a gap in the periodic table which is not possible.