They are easily lost because they are the furthest away from the nucleus, making them the easiest to remove. To visualize that, imagine you have paperclips around a magnet. The furthest one will be the easiest to take off, and it will become harder to take them away as they get closer to the magnet.
In order to be stable most atoms want an outer valence shell with 8 electrons. An atom such as Cl has 7 electrons in its outer shell. It would be much more energetically favorable for it to gain one electron to have 8 in its outer shell, rather than to strip away 7 electrons to have 8 in its outer shell.
because it is simpler to gain the electrons rather than lose like say 5 or 6
isotope?
Number of electrons are lost by an atom in a chemichl reaction
The valence electrons of an atom are those electrons that are in its outer energy shell or that are available for bonding. The electrons more loosely held by the nucleus - are the ones that are gained, lost or shared.
When an atom gains or loses electrons, it is trying establish a more stable situation in which it has a full valence shell. An atom that has gained or lost valence electrons is called an ion. When a positive ion and a negative ion can bond due to their opposite charges. This is called an ionic bond.
valence electrons.. every element wants to have 8 which is why there are ions and such.. elements which already have 8 to begin with are called noble gases and can be found on the last column on the periodic table :)
The force of attraction between the atom's nucleus and its valence electrons are the least. Hence valence electrons are lost easily.
isotope?
Number of electrons are lost by an atom in a chemichl reaction
yes it does. if the electrons are lost easily, reactivity is more.
The valence electrons are either lost to another atom or the sodium atom gains valence electrons, it really depends on if what the sodium atom is bonding with has a lot or a little of valence electrons. The structure doesn't change though, just the number of valence electrons change. The nucleus is never changed when an ion is formed.
an ion.
covalent bonds
Yes, The electrons are unequally shared in an Ionic Bond. One atom has more electrons than the other atom. Every Atom has Electrons that are called Valence Electrons. These Valence Electrons are the electrons in the outer shell of the Bohr Model of the atom. There should be a stable number of Valence electrons (2 or 8) for an atom to be completely stable. To stabilize the valence electrons the atom bonds with other atoms. One type of bond is called ionic bond where one atom gives up a certain number of electrons to be stable and another atom gains all of those lost atoms.
two electron should be lost
The valence electrons of an atom are those electrons that are in its outer energy shell or that are available for bonding. The electrons more loosely held by the nucleus - are the ones that are gained, lost or shared.
In the atom which will form the positive ion, the valence electrons is/are being given up and lost to the reaction medium (environment). In the atom which will form the negative ion, the valence electrons lingering in the reaction medium will be attracted to the proton of the negative ion and is taken in by the negative ion.
An ion is certain type of atom. Ions are atoms that have lost or gained electrons (often to have 8 valence electrons in the s and p orbitals).