<span>Sm
For an element to have a partially filled f orbital, it will have to have an f orbital in the first place, this cancels barium, as it is the lightest of the elements listed:
Barium does not have an f orbital:
[Xe]6s^2
or
1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^10 5p^6 6s^2
Sm:
[Xe] 4f6 6s2
Does have an f orbital AND they are partially filled (the F subshell has the potential to hold 14 electrons, but Sm only holds 6 electrons on its F subshell, therefore the electrons, by the rule of maximum multiplicity, in which the electrons will try to occupy orbitals by themselves first (the F subshell has 7 orbitals because 14/2 = 7), it leaves the f subshell with partially filled orbitals.
Os:
Xe 4f14 5d6 6s2
all occupied f orbitals
Bi:
Xe 4f14 5d10 6s2 6p3
Has full F orbitals </span>
Answer:
stars
earth isn't made of gas. (and you can always see it)
moon us not gas, or give off heat
sun is only visible during the day
The four main categories of mineral formation or igneous or magmatic in which minerals crystallized sedimentary result of sedimentation the processes run materials or particles from other rocks that have undergone weathering or a Rosian metamorphic in which new minerals
Answer: In other words, mitochondria
Explanation: