In the predicted electron configuration of Molybdenum (Mo), how many electrons are in the 4d subshell?

2. How many electrons are in the 4d subshell of the Molybdenum (III) ion?

You need to review the Aufbau Diagram. It shows the order of electron entry for the building up process. For Mo, it is in the 5th row of the periodic table => Mo:[Kr]5s^24d^4 ... for Mo(+3), ionization of transition metals always starts from the valence level (the highest principle Quantum Number => 5) then moves into the 4d level. Mo(+3):([Kr]4d^2)^+3.

To determine the electron configuration of an element, we follow the Aufbau principle, which states that electrons fill orbitals in order of increasing energy. The electron configuration of Molybdenum (Mo) is 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^5.

1. To find the number of electrons in the 4d subshell of Molybdenum (Mo), we look at the superscript next to the 4d subshell, which is 5. Therefore, there are 5 electrons in the 4d subshell of Molybdenum (Mo).

Now, let's move on to the Molybdenum (III) ion.

2. Molybdenum (III) ion means that it has lost three electrons. When Mo loses three electrons from its neutral state, the electron configuration becomes 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^4.

In the Molybdenum (III) ion, we still have 4d subshell filled up to 4d^4. Hence, in the 4d subshell of the Molybdenum (III) ion, there are 4 electrons.

To determine the electron configuration of Molybdenum (Mo), we need to look at its atomic number, which is 42.

1. Electron configuration of Molybdenum (Mo):
The electron configuration of an atom can be represented as a series of numbers and letters that represent the subshells and the number of electrons in each subshell.
The electron configuration of Molybdenum (Mo) is: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d⁵.

In the 4d subshell, we can see that there are 5 electrons.

2. Electron configuration of Molybdenum (III) ion:
To determine the electron configuration of the Molybdenum (III) ion, we need to take into account the 3+ charge on the ion. This means that 3 electrons have been removed from the neutral atom.

Since Molybdenum (Mo) has a configuration of 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d⁵, when 3 electrons are removed, the resulting electron configuration is: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4p⁶ 5s².

Therefore, even in the Molybdenum (III) ion, there are still 5 electrons in the 4d subshell.