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In order for an atom to be electronically stable, all the valence electrons need to be there. This could be as little as two, as is the case for hydrogen, but could also be four, six or eight. It all depends on the atom.
an atom needs 8 electrons in its outer shell to complete its octet.In some cases an atom has only 2 [e-] in in its outer shell and hence it is stable.with 8 [e-] in the outer shell the atom is stable...
Generally speaking, it would be 8 electrons, but there are many exceptions.
2 for a s block element
6 for a p block element
10 for a d block element
14 for a f block element
Eight electrons for most atoms.
8
8
Eight.
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Electrons in the outer most energy level is called "valence electrons." Groups are the columns of the periodic table. The more valence electrons (up to 8), the closer to the right. The number of electrons needed to make an atom stable is 8. (Minus Hydrogen and Helium, which only need 2 electrons to be stable.)
Eight electrons, called an octet, are needed by most atoms in order to be stable.
6 electrons
8 electrons
There is a lot of evidence that backs this up, and is the reason that scientists needed to invent quantum physics to describe small molecules. Atomic spectroscopy is probably the most convincing. When we shoot energy at atoms, only certain very specific energies are released. In addition, molecules will only interact with very certain specific energies of electromagnetic radiation. These tow things lead us to believe that electrons only have specific levels of energy. In addition, there is a minimum energy that electrons can take, called the Zero Point Energy, below which electrons cannot go. It makes sense that there would be this minimum energy. Since electrons have a charge, they radiate energy as they orbit the charged nucleus of the atom. Eventually, the electron should radiate so much that it looses all its energy and fall into the nucleus. This would make matter very unstable. But because electrons only take on certain values, this doesn't happen!
Generally speaking, it would be 8 electrons, but there are many exceptions.
8 are traditionally needed in the valence shell.
Generally speaking, it would be 8 electrons, but there are many exceptions.
Lithium has three electrons, two in the inner shell and a single one ouside that, so there are two energy levels. See the link below
electrons jump energy levels becouse each level has a specific amount of energy needed inorder to be in that level. when an electron gets enough energy it jumps to the next level it can possible be in with that amount of energy.
8 electrons
CONCEALABLE CAMERAS: 29 (Enforcer) Needed on Hitman levels to get blackmail photos (energy needed: 609 minimum) BLACKMAIL PHOTOS: 403 (Hitman) 35 needed on Consigliere levels 184 needed on Boss levels for "Buy off Fed Agent" 184 needed on Boss levels for "Blackmail DA" (energy needed: 9,672) UNTRACEABLE CELL PHONES: 306 (Enforcer) 25 needed on Capo levels for "Flip A Snitch" 62 needed on Capo levels for "Dodge FBI trail" 35 needed on Consig levels for "Ransom kids" 184 needed on Underboss levels for "Order a hit" (energy needed: 6,426 minimum) ILLEGAL TRANSACTION RECORDS: 424 (Capo) 52 needed on Consig levels for "Fix the big game" 184 needed on Underboss levels for "Extort Corrupt Judge" 79 needed on Underboss levels for "Embezzle Funds" 109 needed on Boss levels for "Shake Down" (energy needed: 11,024 minimum) COMPUTER SET UP: 263 (Enforcer) 79 needed on Underboss levels for "Embezzle funds" 184 needed on Underboss levels for "Take over ID theft" (Enforcer) (energy needed: 5,523 minimum)
The first energy level can take a maximum of two electrons.
For example when the electron absorb energy.
the bottom of the Periodic Table. why? a metal looses electrons and at the bottom of the periodic table is the lowest amount of ionization energy (the energy needed to remove electrons) with low ionization energy, not much energy is needed to remove those electrons making it faster and easier to do so.
Electrons in the outer most energy level is called "valence electrons." Groups are the columns of the periodic table. The more valence electrons (up to 8), the closer to the right. The number of electrons needed to make an atom stable is 8. (Minus Hydrogen and Helium, which only need 2 electrons to be stable.)
The ionization energy of an element.