All of the elements in group 18 have complete outer shells, and are called the noble gases. They are helium, He, neon, Ne, argon, Ar, krypton, Kr, xenon, Xe, and radon, Rn.
The element with the symbol At is Astatine. Astatine is a Group 17(7) Halogen and is radioactive. It has 85 electrons in 6 shells, with 7 electrons in the outer shell.
There is NO element in the Periodic Table with the symbol 'Hn'. The nearest is hydrogen (H).
The only element which has the symbol Au is gold.
Hydrogen! :)
The atomic number of the element with the symbol "Pt" on the periodic table is 78.
The element with the symbol At is Astatine. Astatine is a Group 17(7) Halogen and is radioactive. It has 85 electrons in 6 shells, with 7 electrons in the outer shell.
There is NO element in the Periodic Table with the symbol 'Hn'. The nearest is hydrogen (H).
The only element which has the symbol Au is gold.
Hydrogen! :)
Symbol describes an element. It notates name of element.
The atomic number of the element with the symbol "Pt" on the periodic table is 78.
If you meant "element" as in a chemical element, there is no element with the symbol "ef" in the periodic table.
There is no element with symbol a or A even
The periodic symbol for the carbon element is: C. Carbon is in the 14th element group and can also be found almost anywhere in the world. The most famous place to find carbon is in graphite and diamonds.
No element has the symbol A
there is no element with the symbol A.
Be is the symbol for the element beryllium