What information is needed to determine the energy of an electron in a many-electron atom? a) n. b) l. c) ml. d)ms

The quantum number n specifies the energetic level of the orbital, the first level being the one with the least energy. As n increases, the probability of finding the electron near the nucleus decreases and the orbital energy increases.

In the case of atoms with more than one electron, the quantum number l also determines the sublevel of energy in which an orbital is found, within a certain energy level. The value of l is designated by the letters s, p, d, and f.

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ardni313 ardni313 · Answer 2 · 2019-12-04T03:59:50+01:00

The principal quantum number (n) is needed to determine the energy of an electron in a many-electron atom

Further explanation

In an atom, there are energy levels in the shell and sub shell.

This energy level is expressed in terms of electron configurations.

Writing the electron configuration starts from the lowest to the highest subshell's energy level. There are 4 sub-shells in an atom's shell, namely s, p, d, and f.

Each sub-shell also has orbitals drawn in the form of a square box in which there are electrons symbolized by half arrows.

Each orbital in an atom consists of 4 quantum numbers

n is the principal quantum number ---> describes the size of the orbitals

l is the angular momentum / azimuthal quantum number -> describes the shape of the orbitals.

ml, the magnetic quantum number -> describes the orientation of orbitals in space

ms, the electron-spin quantum number ---> describes the spin of electrons

Value of n: positive integer

value of l: s = 0, p = 1, d = 2, f = 3, ... (n-1)

ml value: between -l to + l

ms value: +1/2 or -1/2

The energy of the electrons is indicated by the value of n, because electrons can move between the shell by releasing energy or absorbing energy. the greater the value of n, the greater the electron energy . The Value of n = 1 is the lowest energy level

So the correct answer is a)n

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Keywords: orbitals, subshells, quantum numbers