valency more than 8

Valence Electrons - The outermost shell of an atom is known as the valence shell. The electrons present in the valence shell are called valence electrons. K L M Na - 11 - 2 8 1 Valence shell - M Valence electrons - 1 Core electro..

The number of valence electrons is the valency of the element. The valency of an element can also be calculated by finding the number of electrons required to complete octet (8). i.e., 8 number of valence electrons = valency..

Valence electrons of an atom are responsible for chemical reactions as they take part in them. Elements having same number of valence electrons in their atoms possess similar chemical properties. All alkali metals have one valence electron in their atom. Thus, their..

The two atoms of oxygen mutually share two pairs of electrons each with an atom of carbon to form a molecule of carbon dioxide (Fig. 3.13). Note : In the above diagram only the valence or outermost shell of carbon and oxygen atoms are shown..

Representative elements are those elements whose inner shells are complete and whose outer shell (valency shell) has 1 to 7 electron..

Cl - 17 : 2, 8, 7Valency = 8 - Number of valence electrons= 8 - 7..

0 - 8 : 2, 6 Valency = 8 - Number of valence electrons = 8 - 6 = 2 Let us test our understanding of valency and valence electrons before we proceed ahea..

A - 2, 8, 2 - It is a metal as it has 2 valence electronsB - 2, 8, 6 - It is a non-metal as it has 6 valence electronsC - 2, 6 - It is a non-metal as it has 6 valence electr..

Electron configuration: K L M 2 8 7 Number of valence electrons = 7Valency = 8 - 7 = 1Valence shell ..

Na - 11; 2, 8, 1Number of the valence shell - 3Therefore, sodium is placed in period 3 of the periodic tab..