The first quantum number (n) represents the energy level (shell), so for a 1s2 electron, it would have a value of 1.
n = 2
n=1
3
Phosphorus has 15 electrons. The electron distribution in a phosphorus atom is 2 electrons in the first energy level, 8 electrons in the second energy level, and 5 electrons in the third energy level.
The magnetic quantum number (m) can range from -l to +l, where l is the azimuthal quantum number. For an element with n=1 (first energy level), l=0. Therefore, the magnetic quantum number (m) can only be 0.
The first quantum number of a 2s electron in phosphorus is the principal quantum number, which specifies the energy level of the electron shell. For a 2s electron, the principal quantum number is 2.
n = 2
The first quantum number is the principal quantum number (n), which indicates the main energy level of an electron. For a 2s electron in phosphorus (atomic number 15), the first quantum number is 2.
n=1
The first quantum number (principal quantum number) for the 1s2 electron in a phosphorus atom is n = 1. This indicates the energy level or shell in which the electron is located.
3
n=3
The energy level the electron is in
The energy level the electron is in
The first quantum number is the principal quantum number, denoted by "n." In aluminum, the 3p1 electron would have a principal quantum number of n = 3, since it is in the third energy level orbiting the nucleus.
n = 3
The first quantum number, known as the principal quantum number (n), provides information about the energy level or shell in which an electron is located in an atom. It indicates the distance of the electron from the nucleus, with larger values of n corresponding to higher energy levels farther from the nucleus.