Question

How are the groups on the periodic table arranged?

Answer 1

Hint: Periodic table of elements is basically the chart of the chemical elements. Modern periodic table was discovered by the scientist Mendeleev in the year of 1869 and this table was published in German journal of Chemistry.

Complete answer:
- The periodic table is a regular arrangement of elements. There are 118 elements in this periodic table. It is the greatest source of information as far as chemistry is concerned.
- It enables chemists to easily understand and to compare the properties of elements.
- Elements in the table are arranged according to their increasing atomic number and recurrent chemical properties.
- This table is arranged in the forms of rows and columns where row is termed as period and column ad group.
- Elements are arranged from left to right and from top to bottom in the order of their increasing atomic number.
- There are 18 groups and 7 periods in the periodic table and elements which are in the elements which are in the same group and have the same valence electronic configuration possess similar chemical properties.
- Whereas the elements which are in the same periods have an increasing order of their valence electrons.
- The period is a horizontal arrangement of elements while a group is a vertical arrangement
of elements.

Note:
Rather than these groups and columns there are also two lines present below the periodic table in these lines, elements present are known as lanthanides and actinides.