its chemicl reactivily is determined by the number of eletrons in its outer shell property fudamental
the valence electrons cause the chemical reations. the valence electrons decide that element attract to which element.
There are two: the cyclic group (C10) and the dihedral group (D10).
For Groups 1 and 2 the valence number is the group number, for groups 13-18 it is the last digit of the group number so oxygen (group 16) would have 6 valence electrons. For all the other groups ( group 3-12, the transition metals ) they are variable.
groups are important in the periodic table because from them we get to know about the chemical and the physical property of an element. we also get to know about the number of electrons in the outer most shell.
The groups in the periodic table tell you what each element within them will react with, the number of valance electrons the element has, and what family it is in.
the atomic masses and atomic numbers... group number and period number... valence electrons and number of shells... these all determine the chemical properties of elements...
Because groups/families determine how many valence electrons the element will have. Therefore, all the elements in a group/family have the same number of valence electrons Chemimal and Physical.
The Group Number of the Element you're working on determines the number of Valence Electrons. Valence electrons are electrons in the outside energy level.
The element "Cadmium" is in group number 12.
For the group 1 and 2 elements, the group number is the number of valence electrons. For groups 13 - 18, subtract 10 from the group number to get the number of valence electrons.
Rows of elements are called periods. The period number of an element signifies the highest unexcited energy level for an electron in that element. Columns of elements help define element groups. Elements within a group share several common properties. Groups are elements have the same outer electron arrangement.
The number of valence electrons in an element is represented by the group number; for example, all elements in group one have one valence electron, all elements in group two have two valence electrons, etc.