'Valence' is the combining capacity of an element. It refers to the number of electrons in the outer shell. The number of valence electrons, versus the maximum number of possible electrons in that shell, affects the ability of atoms to combine.
For instance, water is H2O, or two atoms of hydrogen and one atom of oxygen per molecule. Each atom of hydrogen has one electron in the first shell, with a maximum of two. Each atom of oxygen has 6 electrons in the second shell (2 in the first), with a maximum of eight. The electron in hydrogen "fills in the gap" in the outer shell of oxygen. Since there are two "gaps", then two atoms of hydrogen are required. This is why water is H2O, and not H3O, or something else.
Another example is plain oxygen. Since it has a "gap" of two, it "prefers" to make molecules of two atoms, i.e. O2. Each atom will share two valence electrons with the other atom, effectively filling the valence shell.
If the outer shell is filled, then the atom is not reactive and does not combine with other elements. This is the case for the noble gases Helium, Neon, Argon, Krypton, Xenon, and Radon.
Valence as in Valence Electrons are the electrons in the outer "belt" of electrons.
The valence electrons are involved in the chemical bonding of atoms in a molecule.
it has a full octet
Zero valence
The valence of aluminium is 3+.
Valence electrons
The valence electrons are involved in the chemical bonding of atoms in a molecule.
If you mean "where are the valence electrons" then they are flying around the outside of the atom.If you mean "why" then I don't know. they're just there to be the outermost set of electrons.
C is 4*2 H is 1*2 For a total of 10 valence electrons
it has a full octet
No such thing as pi3, but if you mean PI3, then there are 5 valence electron in P, and each I has 7 valence electrons for a total of 5 + 7 + 7 + 7 = 26 valence electrons.
a) Valence electrons means the electrons present in the outermost orbit of an atom. b) Valence electrons means the outer shellof an atom, which determine its power to combine with other elements.
none its innert Being inert does not mean you don't have valence electrons. Helium has two valence electrons, both in a 1s orbital.
In science, valence refers to the combining power of an element. It determines how many chemical bonds an atom can form with other atoms. Valence is important in understanding and predicting how elements will react with each other to form compounds.
It means that the species has completely filled valence orbitals.
In chemistry, the term "valence" refers to the combining capacity of an atom, which is determined by the number of electrons it can gain, lose, or share in order to achieve a stable electron configuration.
If you mean group then your referring to the columns of the periodic table. They will all have the same number of valence electrons and similar chemical and sometimes physical properties.
If by valences, you mean valence electrons, chromium has 6, lithium has 1, carbon has 4, and sulfur has 6. If by valences, you mean valence electrons, chromium has 6, lithium has 1, carbon has 4, and sulfur has 6.