# How many electrons can be in each shell?

Each shell can contain only a fixed number of electrons: The first shell can hold up to

**two electrons**, the second shell can hold up to eight (2 +**6**) electrons, the third shell can hold up to**18**(2 + 6 + 10) and so on. The general formula is that the nth shell can in principle hold up to 2(n^{2}) electrons.A.

### How many orbitals are in the 4f subshell?

The subshell has

**one orbital**for a total of 2 electrons. The subshell has**three orbitals**for a total of 6 electrons. The subshell has**five orbitals**for a total of 10 electrons. The subshell has**seven orbitals**for a total of 14 electrons.#### What is the Aufbau principle in chemistry?

The**aufbau principle**states that in the ground state of an atom or ion, electrons fill atomic orbitals of the lowest available energy levels before occupying higher levels. For example, the 1s shell is filled before the 2s subshell is occupied.**Aufbau**is a German noun that means construction or "building-up".#### What is the L quantum number for a 4s orbital?

Table of Allowed Quantum Numbersn l Orbital Name 4 0 4s 1 4p 2 4d 3 4f #### How many electrons are in the f orbital?

This tells us that each subshell has double the electrons per orbital. The s subshell has 1 orbital that can hold up to 2 electrons, the p subshell has 3 orbitals that can hold up to 6 electrons, the d subshell has 5 orbitals that hold up to 10 electrons, and the f subshell has 7 orbitals with**14 electrons**.

B.

### How many electrons are in 4f?

The s sublevel has just one orbital, so can contain

**2 electrons**max. The p sublevel has 3 orbitals, so can contain**6 electrons**max. The d sublevel has 5 orbitals, so can contain**10 electrons**max. And the 4 sublevel has 7 orbitals, so can contain**14 electrons**max.#### Is 3d or 4s higher in energy?

According to the Aufbau principle, the**4s**sublevel is filled before the**3d**sublevel because the**4s**is lower in**energy**. As the**3d**sublevel becomes populated with electrons, the relative energies of the**4s**and**3d**fluctuate relative to one another and the**4s**ends up**higher in energy**as the**3d**sublevel fills.#### How do you find the electron configuration?

**Method 1****Assigning Electrons Using a Periodic Table**- Find your atom's atomic number.
- Determine the charge of the atom.
- Memorize the basic list of orbitals.
- Understand electron configuration notation.
- Memorize the order of the orbitals.
- Fill in the orbitals according to the number of electrons in your atom.

#### What is an energy sublevel?

A**sublevel**is an**energy**level defined by quantum theory. In chemistry,**sublevels**refer to energies associated with electrons. In physics,**sublevels**may also refer to energies associated with the nucleus. Shell 5 can hold up to 50 electrons,

C.

### How many electrons are in the 5d Subshell?

The fourth shell has 4 subshells: the subshell, which has 1 orbital with

**2 electrons**, the subshell, which has 3 orbitals with**6 electrons**, the subshell, which has 5 orbitals with**10 electrons**, and the subshell, which has 7 orbitals with**14 electrons**, for a total of 16 orbitals and**32 electrons**.#### What does the principal quantum number tell us?

The principal quantum number, (n), describes the energy of an electron and the most probable distance of the electron from the nucleus. In other words, it refers to the size of the**orbital**and the energy level an electron is placed in. The number of subshells, or (l), describes the shape of the**orbital**.#### How many electrons can fit into a 5d Subshell?

The fourth shell has 4 subshells: the subshell, which has 1 orbital with**2 electrons**, the subshell, which has 3 orbitals with**6 electrons**, the subshell, which has 5 orbitals with**10 electrons**, and the subshell, which has 7 orbitals with**14 electrons**, for a total of 16 orbitals and**32 electrons**.#### How many 4f orbitals are there in an atom?

Discussion: Each of the**7 4f orbitals**accommodates a pair of electrons. There are 14 elements in the lanthanides, the 4f block elements.

Updated: 2nd October 2019