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What is the isotope notation for lithium?
It depends on the specific isotope of lithium that you're talking about. Lithium has five , and each will have different notation.
For example, the for lithium-7 is: ##._3^(7)Li##
Lithium-7 is commonly used in salt and nuclear reactors.
##._(A)^ZX##, where X is the atomic symbol for the element, here Li for lithium, Z is the , or the total number of protons and neutrons, and A is the , or the number of protons.