roentgenium
Rg stands for Roentgenium, which is a synthetic element with atomic number 111. It is a highly radioactive element that does not exist in nature and has only been created in the laboratory.
N stands for Nitrogen on the periodic table.
Beryilium
iodine
there is no such element
iodine
Roentgenium is a chemical element in the periodic table that has the symbol Rg and atomic number 111, ...
Sn stands for the element tin in the periodic table.
No, the symbol "H" stands for Hydrogen on the periodic table. The symbol "He" stands for Helium on the periodic table.
Copernicium's periodic number is 112. It is is in period 7, group 12. Hg is above it, Rg is to the right of it, and Unutrium (temporary name) is to the left of it. (Depending on your periodic table, it may be slightly different.)
Argon is what Ar stands for on the Periodic Table of elements.
potassium