No, it is not true.
In the periodic table only the chemical elements appear; but tables for isotopes also exist.
Periodic table comprises of elements arranged in rows and columns.So that the elements having similar properties appear together.
These elements are metals, to the left.
Transuranium elements are elements that appear after uranium. Elements with atomic number 93 to 103, appear in the actinides whereas elements with atomic number 104 to 118 appear in the 7th period.
The elements that are good conductors of heat and electricity, can be pounded into sheets or drawn into wires, and have a shiny metallic luster are known as metals. Common examples include copper, aluminum, and gold. These elements are typically found on the left side and in the center of the periodic table. They exhibit properties such as malleability, ductility, and high electrical conductivity, making them essential for various industrial applications.
All elements appear in the periodic table, there are more than 100 of them, so please look at the related link below to see an example of such table and all symbols of them.(Please note that there is no special group of 'periodic' elements)
No, if whatever you are looking for does not appear on the Periodic Table of Elements then it is not an element.
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.
FeSO4 stands for ferrous sulfate. however it is a compound and does not appear on the periodic table periodic table consists of only elements, not compounds
Brass is an alloy of the elements copper and zinc. Alloys do not appear on the periodic table. Copper is an element with the symbol Cu and zinc is an element with the symbol Zn. They both appear on the periodic table.
J Q appears in some older periodic tables as 'Unq' (unnilquadium), the temporary name for what is now called Rutherfordium (At. no. 104).
All the synthetic elements on the Periodic Table appear after Uranium (atomic no. 92). These are the only synthetic elements.