it's neon
The fiftieth element is tin. It is represented by the chemical symbol Sn.
There is no specific element with the symbol SCN on the periodic table. SCN commonly refers to the thiocyanate ion (SCN-) which is a polyatomic ion. It is a combination of sulfur (S), carbon (C), and nitrogen (N), commonly found in compounds.
Carbon is a pblock element. It shows -4 to +4 oxidation numbers.