What is the nuclear symbol for the isotope of gallium, #Ga#, that contains 40 neutrons per atom? Chemistry Matter Isotopes 1 Answer anor277 Aug 24, 2016 #""^71Ga# Explanation: The atomic no. #Z# for #Ga=31#; given the #Ga# symbol, #Z# has been specified. This isotope contains 40 neutrons in its nucleus; thus we write the isotope as #""^71Ga#. Answer link Related questions How would you find the atomic number, atomic mass, protons, neutrons and electrons for ions and... Question #f36d4 How are isotopes of elements formed? What radioactive isotopes are naturally occurring? How do isotopes of carbon differ from one another? Strontium consists of four isotopes with masses of 84 (abundance 0.50%), 86 (abundance of 9.9%),... Why are the isotopes of an element chemically similar? Naturally occurring europium (Eu) consists of two isotopes with a mass of 151 and 153. 151/63 Eu... Oxygen is composed of three isotopes 16/8 O (15.995 u), 17/8 O (16.999 u) and 18/8 O (17.999 u).... Copper is listed on the periodic table as having a relative atomic mass of 63.55. Reference... See all questions in Isotopes Impact of this question 22523 views around the world You can reuse this answer Creative Commons License