How many
vertical
coloumn are there in a periodic table ? what are they called.
Answers
Answer:
There are 18 vertical columns
The vertical columns on the periodic table are called groups or families because of their similar chemical behavior. All the members of a family of elements have the same number of valence electrons and similar chemical properties. The horizontal rows on the periodic table are called periods.
Explanation:
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Answer:
There are 18 vertical columns in a modern Periodic Table .
These vertical columns in a Periodic Table is known as groups.
PERIODIC TABLE
- The first periodic table was made by a Russian chemist Dmitri Mendeleev in the year 1869 .
- Mendeleev arranged elements in the increasing order of atomic mass.
- The periodic table that we use today was published in the year 1913 by an English physicist Henry Moseley .
- The modern periodic elements includes 118 elements , out of which 94 are natural and others are man-made elements.
Groups and Periods in a Modern Periodic Table
- There are 18 vertical columns and 7 horizontal rows in modern periodic table .
- The vertical columns are known as Groups and horizontal rows are called Periods.
GROUPS in Modern Periodic Table
As mentioned above there are 18 vertical columns called groups in a modern periodic table .Most of these groups are known in the name of the first member of the group. Most of the group are known by the first member in it .
Now let us see what each of these groups are called :-
Group one is called the Lithium Family or Alkali metals.
Group two is called the Beryllium Family or Alkaline earth metals .
Group three to Twelve are known as The Transition metals .
Group thirteen is called the Boron Family .
Group fourteen is called the Carbon Family.
Group fifteen is called the Nitrogen Family .
Group sixteen is called the Oxygen Family .
Group seventeen is called the Fluorine Family or the Halogens .
Group eighteen is called the Noble gas Family .