Answer:
63 Cu
Step-by-step explanation:
Isotopes are atoms of an element with the normal number of protons and electrons, but different numbers of neutrons. Isotopes have the same atomic number, but different mass numbers. The different isotopes of an element have identical chemical properties.
63 refers to the mass number of the isotope. The mass number is the total number of protons and neutrons in the nucleus.
Cu refers to the element, which is copper. Copper has an atomic number of 29, meaning it has 29 protons.
To determine the isotope symbol, we write the element symbol (Cu) followed by the mass number as a superscript.
The element copper has an integer mass number of 63. Since the atomic number is 29, there must be 63 - 29 = 34 neutrons.
Therefore, the isotope symbol for a copper isotope with 29 protons and 34 neutrons, giving it a mass number of 63, is:
63Cu. Same thing.