The number of protons, neutrons and electrons, respectively, in 115Cd2+ are?
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48 protons, 67 neutrons, and 46 electrons.
To determine the number of protons, neutrons, and electrons in the 115Cd2+ ion, we need to consider the atomic number, mass number, and the ion's charge.
1. Atomic number (Z): Look up the atomic number for the element cadmium (Cd) on the periodic table. The atomic number of cadmium is 48. This tells us there are 48 protons in the nucleus of a cadmium atom.
2. Mass number (A): The mass number is the total number of protons and neutrons in an atom. Isotopes of cadmium have different mass numbers. For instance, the most common isotope of cadmium is cadmium-112, which has 48 protons and 64 neutrons. However, the question doesn't specify a particular isotope, so we cannot determine the exact number of neutrons without that information.
3. Ion's charge: The 2+ charge indicates that the ion has lost two electrons. A positive charge means the ion has more protons than electrons.
To determine the number of electrons, subtract the charge from the atomic number:
Electrons = Atomic number (Z) - Ion's charge
In this case, Electrons = 48 - 2 = 46.
So, the number of protons, neutrons, and electrons in the 115Cd2+ ion cannot be determined solely with the given information, as we don't have the exact mass number or isotope. However, we know there are 48 protons, and the ion has 46 electrons due to the 2+ charge. The number of neutrons cannot be determined without the specific isotope.