s^2 p^6 d^10 f^14
or
1s^2 2s^2 2p^6 3s^2 3p^6 3d^10 4s^2 4p^6 4d^10 4f^14
Depending on what you meant.
15
Electron shells
Three electron shells.
An electron in the third shell has more energy than the electron in the second shell.
4 electron shells; 2 electrons in first, 8 in second, 8 in third and 2 in valence shell.
Electron shielding is not a factor across a period because they all have the same number of electron shells! No further (extra) shells means that they are all affected by electron shielding equally.
They have the same number of shells (or energy levels).
The set of numbers that shows the arrangement of electrons in their shells is known as the electron configuration. It is based on the principle that electrons fill the lowest energy levels first before moving to higher energy levels. The electron configuration is typically represented by a series of numbers and letters indicating the number of electrons in each energy level and orbital.
The electron shell is an energy level represented as the distance of an electron from the nucleus of the atom
Electron shells
An Electron shell is not a specific tangible or recognizable structure.Electron shells are essentially levels of energy where electrons of similar energies congregate.
Fermium has seven electron shells.
Three electron shells.
The arrangement of electrons in an atom.
An electron in the third shell has more energy than the electron in the second shell.
4 electron shells; 2 electrons in first, 8 in second, 8 in third and 2 in valence shell.
The electron can either be by itself outside of an atom, or can be in an atom in a series of energy 'shells' outside of the nucleus.
Electron shielding is not a factor across a period because they all have the same number of electron shells! No further (extra) shells means that they are all affected by electron shielding equally.