At is the chemical symbol of astatine.
At is a radioactive halogen that is itself the byproduct of the decay of more massive radioactive atoms. It has a very short half life, and the "world supply" of astatine (the amount believed to exist at any particular moment anywhere in the entire mass of the planet) is about one ounce (approx. 30 grams).
Se stands for selenium on the Periodic Table.
There is no J in the table
11 is the atomic number for the element sodium in the periodic table.
Calcium.
Niobium
N stands for Nitrogen on the periodic table.
Be stands for Beryllium in the periodic table of elements. It is a light and strong metal that is commonly used in aerospace and defense industries due to its high stiffness-to-weight ratio.
"Br" stands for Bromine in the periodic table.
There is no symbol KM in the periodic table.
Da isnt an element on the periodic table. Sorry!
Se stands for selenium on the Periodic Table.
iodine
Beryilium
there is no such element
iodine
No, the symbol "H" stands for Hydrogen on the periodic table. The symbol "He" stands for Helium on the periodic table.
There is no J in the table