Any element in column 1 of a wide form Periodic Table has exactly one valence electron and reacts with other elements.
Li mainly reacts with other elements by donating it's one lone valence electron to become Li+ and then it forms an ionic bond. For example, Li reacts with Cl by donating an electron and making LiCl.
I reacts in order to get a filled valence shell of electrons.
Almost all elements have multiple valence electrons, there are only 7 that don't. They are: hydrogen, lithium, sodium, potassium, rubidium, cesium, and francium. The elements have 1 valence electron. All other elements have anywhere from 2 to 8 valence electrons
A valence electron, also known as valence orbital, is basically composed of electron and atoms that can make a chemical bond. Valence electrons identify other elementÕs chemical properties to determine if the element may bond with other elements.
Could be many different elements
== == When metals react with other elements, the atoms of the metals give up their valence electrons.
Depending on how many valence electrons in the element has, The other element could take away a valence electron to make eight
The electrons, or the electron cloud, of an atom affect how it reacts chemically with other atoms and molecules.
Iodine is reactive because it has 7 valence electrons and is unstable. It needs one more electron to get 8, which would give it a noble gas configuration, and which would make the iodine atom stable. Iodine reacts with other elements in order to gain the needed electron and therefore become stable.
The elements in groups 1A and 2A have valence electrons in s-orbitals, while the elements in groups 3A-8A have valence electrons in p-orbitals.
The most stable number of valence electrons is 2 for hydrogen and helium, which have only one electron shell in the shell model for atomic electron configurations, and 8 for all other elements.
Noble gases are very unreactive because the valence electron shell is filled.