## What are the 4 quantum numbers for the last electron in iron?

For iron, [Ar]4s23d6 , then n=3 , l=2 (because it is the d orbital), ml is −2 (because you count up one the series from −l to +l six times, for the six electrons in the d subshell) and ms is ±12 .

**What are the 5 quantum number?**

Four quantum numbers can be used to completely describe all the attributes of a given electron belonging to an atom, these are: Principal quantum number, denoted by n. Orbital angular momentum quantum number (or azimuthal quantum number), denoted by l. Magnetic quantum number, denoted by ml.

**What is n l rule?**

The “n” and “l” in the (n + l) rule are the quantum numbers used to specify the state of a given electron orbital in an atom. n is the principal quantum number and is related to the size of the orbital. If two orbitals have the same value of (n + l), they are filled in order of increasing n.

### What is the last electron?

The last electron added is a 3p electron. Therefore, n = 3 and, for a p-type orbital, l = 1.

**What is the highest quantum number?**

Principal Quantum Number, n The principal quantum number is essentially the same as the n of the Bohr model of the atom. The maximum number of subshells permitted for a particular shell is equal to n2. That is, the first energy level (shell) has only one permitted energy sublevel (subshell).

**What is Bohr’s Bury rule?**

(a) Bohr Bury Rules: (i) The maximum number of electrons present in a shell is given by the formula 2n2 (where n is shell no.) (ii) The maximum number of electrons that can be accommodated in the outer most orbit is 8. (iii) Electron are not accommodated in a given shell, unless the inner shells are filled.

#### What is the quantum number of oxygen?

Oxygen – eight electrons

n | ℓ | Orbital Name |
---|---|---|

1 | 0 | 1s |

1 | 0 | |

2 | 0 | 2s |

2 | 0 |

**What is subsidiary quantum number?**

A subsidiary quantum number is a quantum number that determines its orbital angular momentum while the principal quantum number is the quantum number which describes the electron’s state.