How would you give the nuclear symbol for the isotope of gallium, Ga, that contains 40 neutrons per atom?
In order to write the nuclear symbol of an isotope
In your case, you have to determine what the nuclear symbol will be for an isotope of gallium that contains
The first thing to do here is take a look at a periodic table and make a note of gallium's atomic number.
Gallium is located in period 4, group 13 of the periodic table, and has an atomic number equal to
Since this isotope also has
#color(blue)("mass number" = A = "no. of protons" + "no. of neutrons")#
#A = 31 + 40 = 71#
Now, nuclear symbol notation must follow these rules
In your case,