Final answer:
The symbol for the copper isotope with 36 neutrons is incorrectly given as Cu-63; it should be ⁶⁵Cu or copper-65, since the mass number is the sum of the number of protons and neutrons, which in this case is 29 + 36 = 65.
Step-by-step explanation:
The symbol for the isotope of copper with 36 neutrons is Cu-63. This is written because copper has an atomic number of 29, meaning it has 29 protons. The mass number of this isotope is 63, which is obtained by adding the number of protons (29) to the number of neutrons (36), giving us 29 + 36 = 65. This is an error, as the mass number should be 29 + 36 = 65, not 63. Thus, the correct symbol for the copper isotope with 36 neutrons would be ⁶⁵Cu, not ⁶³Cu as initially stated. The mass number (65) is listed before the element symbol (Cu) in this notation. Alternatively, it can be referred to as copper-65.