A: There are various causes of identity crisis, including improper upbringing, lack of affirmation and unpleasant past experiences. Other factors that lead to identity crisis include stress, troubles and societal demands. Lack of ideologies and values, experimenting roles and being a leader may also cause identity crisis.
The Periodic table can also be divided into several families of elements each having similar properties. For our purposes we will define the following ten families: Alkali metals. The alkali metals, found in group 1 of the periodic table, are highly reactive metals that do not occur freely in nature. These metals have only one electron in their outer shell. Therefore, they are ready to lose that one electron in ionic bonding with other elements.
Periodic means repeats at regular intervals.In the periodic table, elements are arranged in vertical columns. These columns are called groups or families. The groups are as follows: Group:IA: (except for H): alkali metals. The most reactive of all metals Group: IIA: the alkaline earth metals. Very reactive and not found in the free state in nature. Most of these elements give up their 2 outer electrons and form ions.