Group

Group
 periodic system consisting of 18 vertical columns, called the
 There are 2 ways for naming groups:
a) the System 8
According to this way, periodic system is divided into 8 groups, namely the main (class A) 8 and the transition (group B).
b) the System 18
According to this way, periodic system is divided into 18 groups, namely the 1 to 18, starting from the far left column.
 elements that have the same valence electrons are placed on the same.
 For the elements of a location in accordance with the periodic system:
number of Group = number of valence electrons

 elements A has the name that is:
a. Group IA = Alkali
b. The group IIA = Alkali Land
c. The group IIIA = Boron
d. The IVA = Carbon group
e. The VA = Nitrogen
f. The group VIA = Oxygen
g. Group VIIA = Halida/Halogen
h. = Group VIIIA = Inert Gas