Respuesta :
Answer:
Definition:
" The principle quantum number describes the energy and size of shell which electron can be found. It also tells the distance of electron from nucleus"
Explanation:
There are four quantum numbers:
- Principal quantum number (n)
- Azimuthal quantum number (l)
- Magnetic quantum number (ml)
- Spin quantum number (ms)
All these four quantum numbers gives complete information about an electron like its spin, shells, subshells and orbitals.
The azimuthal quantum number describe the shape of orbitals. The magnetic quantum number describe the energy levels of subshell. The spin quantum number tells the spin of electron either its clock wise (+1/2) or anti clock wise (-1/2).
Principal quantum number:
The principal quantum number describe the shape and energy of electron and also its distance from nucleus. It is represented by n. Its value is always positive and whole number.
n= 1, 2, 3, 4, 5,.........
It tells that if electron is jumped from shell closer to the nucleus to the shell further away from nucleus, it must absorbed the energy. For example:
If electron is present in the shell n=1 and jumped to the shell n=2 which is larger ion size than n=1, energy is absorbed by the electron. If the electron is jumped from n=2 to n=1 energy should released. Its value can never be zero. These shells also consist of subsehlls s, p, d ,f.
Answer:
The principal quantum numbers represents the energy level or the shell in which the electron is present around the nucleus.
Explanation:
It is usually represented by “n”
n takes the value 1,2,3,4 and so on.
If n=1 then it is first shell
n=2 is second shell
n =3 is third shell
the shells are also named using alphabets like K,L,M,N and so on.
The maximum number of electrons a shell accommodates is found using formula [tex]2n^2[/tex] where n is the number of the shell.
For example the maximum number of electrons the fourth shell that is n=4 occupies will be
[tex]2 \times 4 \times 4=32[/tex] electrons
