3
There are two unpaired electrons predicted for the ground state configuration of bismuth (Bi).
5 unpaired electrons There are 5 unpaired electrons in the Fe3+ ion. The reason for this is that Iron has the electron configuration Ar3d5.
Mercury has no unpaired electrons. It has a fully filled 5d10 shell and its electron configuration is [Xe] 4f14 5d10 6s2.
Two
Iron (Fe) is the element that has 4 unpaired electrons in its electron configuration.
Stadium (St) is an element with the atomic number 51. It has a ground-state electron configuration of [Kr] 4d¹⁰ 5s² 5p³. In this configuration, the 5p subshell has three electrons, which are unpaired. Therefore, there are three unpaired electrons in stadium.
Noble gases, like helium, neon, and argon, have no unpaired electrons in their ground state electron configuration. This means that all of their electrons are paired up in orbitals.
A nickel atom has an atomic number of 28, which means it has 28 electrons. Its electron configuration is [Ar] 3d^8 4s^2. In this configuration, the 3d subshell contains 8 electrons, with 2 of them unpaired. Therefore, a nickel atom has 2 unpaired electrons.
Zero. It has 4 electrons and thus it's electron configuration is 1s2 2s2. Each s orbital can only hold 2 electrons and since each has 2, there are are no unpaired electrons.
Nickel (Ni) has an atomic number of 28, which means it has 28 electrons. Its electron configuration is [Ar] 3d^8 4s^2. In this configuration, the 3d subshell has 8 electrons, with 2 of them paired and 6 electrons remaining, resulting in 2 unpaired electrons. Therefore, nickel has 2 unpaired electrons.
For the ground state electron configuration of an element, we look at the filling of orbitals up to that element's atomic number. Tantalum (Ta) has an atomic number of 73, belonging to the transition metals, and has a ground state electron configuration of [Xe] 4f14 5d10 6s2 6p6 6d3 7s2. Counting the number of electrons in the partially filled orbitals (5d and 6d), there are 3 unpaired electrons.
To deduce the number of unpaired electrons in the ground state configuration of an atom, you can follow Hund's Rule. Fill up the orbitals with electrons, pairing them up first before placing them in separate orbitals. The unpaired electrons are those that remain in separate orbitals after all orbitals are filled with paired electrons. Count these unpaired electrons to determine the total.