It's Nickel.. 64Ni
Na (sodium)
If you think to the isotope hydrogen-6 the symbol is 61H. .
12
The chemical symbol of uranium is U.
An example with a zinc isotope: 81Zn (mass number as superscript before the chemical symbol)
The chemical notation is 19F.
The chemical symbol of actinium is Ac.The symbol of an isotope:- as superscript to the left of Ac is the atomic mass of the isotope- as subscript to the left of Ac is the atomic number 89
no symbol
D is deuterium, or 2H. An isotope of hydrogen with a neutron in addition to the proton.
The chemical symbol for fluorine isotope with 9 neutrons is 18F (18 is a superscript).
The correct symbol of this isotope is 223Fr.
This an isotope of osmium, osmium-191. The symbol is 19176Os.
This is the isotope plutonium-240: 24094Pu.
If you think to the isotope hydrogen-6 the symbol is 61H. .
18F
12
The chemical symbol of uranium is U.
An example with a zinc isotope: 81Zn (mass number as superscript before the chemical symbol)