Electron shells (or orbitals) are infinite. They are always there, but sometimes they are not occupied. The simplest example is the H+ ion, where hydrogen, having only 1 electron, loses it. The orbitals are still existent and are prepared to receive electrons for bonding.
Yes. However, they cannot exist between the shells.
Their outermost electrons are in the same shell. For example, Helium and Hydrogen have 1 and 2 electrons respectively, and these electrons exist within the first electron shell. Lithium has 3 electrons and the third of these electrons is in the second electron shell, and so, it is a member of the 2nd period of the periodic table.
Only one electron exist.
In an atom, an orbital is a region where electrons are likely to be found, while a shell is a group of orbitals with similar energy levels. Orbitals are specific locations within a shell where electrons can exist.
1st shell: 2 electrons, 2nd shell: 8 electrons, 3rd shell: 8 electrons, 4th shell: 4 electrons, 5th shell: 0 electrons, 6th shell: 0 electrons.
The overall of an atom is a nucleus (protons and neutrons), and 1 or 2 electrons. The rest are for large atoms: an electron shell, electrons, an electron shell, electrons, an electron shell, electrons, an electron shell, electrons, an electron shell, electrons, an electron shell, electrons, an electron shell, electrons.
The external shell of electrons is completely filled.
Shell 1: Two electrons Shell 2: Eight electrons Shell 3: Eight electrons Shell 4: Eighteen electrons
Valence electrons. They exist in the atom's valence shell.
2 electrons in the K shell and 8 electrons in the L shell
In the first shell there are two electrons and in the second shell there are six electrons, but only the electrons in the second (outer) shell are valence electrons.
Maximum number of electrons = 2n2, where n is the number of shell (n = 1 for K, 2 for L, 3 for M, and so on) K shell has 2 electrons maximum L shell has 8 electrons maximum M shell has 18 electrons maximum N shell has 32 electrons maximum O shell has 50 electrons maximum P shell has 72 electrons maximum