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4f refers to someone who is physically unfit for military service.
4F in cartoons refers to a military reject because of poor physical condition.
not good for the army .
If you are referring to the US miitary-service draft laws: 4F
The 4f series is referred to as the Lanthanides.
4f is a valid orbital.
There are 7 4f orbitals in an atom
The 4f sublevel has 7 orbitals, each of which can contain 2 electrons. So the maximum number of electrons in the 4f sublevel is 14.
The maximum number of electrons that can exist in 4f orbitals is 14. This is because each of there are 2 electrons in each of the 7 4f orbitals.
I found the classifications listed on the Selective Service Agency. I do remember that a person who was 4F was physically unable to serve. If someone was gay he was barred from the forces in World War 2.ClassificationsMen are not classified now. Classification is the process of determining who is available for military service and who is deferred or exempted. Classifications are based on each individual registrant's circumstances and beliefs. A classification program would go into effect when Congress and the President decide to resume a draft. Then, men who are qualified for induction would have the opportunity to file a claim for exemptions, deferments, and postponements from military service. Here is a list of some, though not all, classifications and what they mean:1-A - available immediately for military service.1-O Conscientious Objector- conscientiously opposed to both types (combatant and non-combatant) of military training and service - fulfills his service obligation as a civilian alternative service worker.1-A-O Conscientious Objector - conscientiously opposed to training and military service requiring the use of arms - fulfills his service obligation in a noncombatant position within the military.2-D Ministerial Students - deferred from military service.3-A Hardship Deferment - deferred from military service because service would cause hardship upon his family.4-C Alien or Dual National - sometimes exempt from military service.4-D Ministers of Religion - exempted from military service.
Traditionally, when the draft was in effect, flat-footedness would result in 4F status, "Unfit for Military Service." This is no longer true.
They aren't. What you probably mean to ask is why are 5d orbitals filled before 4f orbitals, and the reason is despite the numbers, electrons always occupy the level that requires the least-energy first, as stated in the aufbau principle. In this case, the 5d orbtial requires less energy than the 4f orbital, so it is filled before the 4f orbital. The same can be said for the reason why 4s orbitals are filled before 3d orbitals, which may be what you were asking about.
The 4-F classification in US Military was given primarily for muscular and bone malformations and will be rejected in military services
the correct order is-4s>4p>4d>4f this is because of the shape of the orbitals
The electron configuration of the 4f energy sublevel is the most stable is 4f to the 14th power. The electron configuration of outer sublevels that are most stable is 4d up to the 5.5s up to the 1st power.
Maximum capacity of electrons in f-orbitals is 14, so 4f orbitals may have 1 to 14 electrons.
4f subshell has the highest energy. A f subshell has the highest energy among all the subshells in any shell.
Mt. Pyre 4F and higher.