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Explain the Periodic Table.
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Answer:
In chemistry, a group (also known as a family[1]) is a column of elements in the periodic table of the chemical elements. There are 18 numbered groups in the periodic table, and the f-block columns (between groups 3 and 4) are not numbered. The elements in a group have similar physical or chemical characteristics of the outermost electron shells of their atoms (i.e., the same core charge), as most chemical properties are dominated by the orbital location of the outermost electron.
There are three systems of group numbering for the groups, that often assign the same number to different groups. The modern numbering "group 1" to "group 18" has been recommended by the International Union of Pure and Applied Chemistry (IUPAC) since about 1990. It replaces two older incompatible naming schemes, used by the Chemical Abstract Service (CAS, more popular in the U. S.), and by IUPAC before 1990 (more popular in Europe).
Groups may also be identified by their topmost element or have a specific name. For example, group 16 is variously described as the "oxygen group" and as the "chalcogens". However, iron group usually does not mean "group 8". In chemistry it may mean either iron, cobalt, and nickel, or some other set of elements with similar chemical properties. In astrophysics and nuclear physics, it usually means those three plus chromium and manganese.
Answer:
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The periodic table contains seven horizontal rows called the periods 1 to 7. Similarly, the eighteen vertical columns in this table are called groups
1 to 18.
The arrangement of the periods and grounds results into formation of boxes. There are total 118 boxes for elements.
Apart from seven rows and 18 columns, two rows are separately given at the bottom of periodic table. These are called lanthanide and actinide series.
The whole periodic table is divided into blocks, viz s, p, d, f.
s- block : contains 1 and 2 groups.
p- block: contains 13 to 18 groups
d- block : contains 3 to 12 groups.
Where as lanthanide and Actanide series are called "f" block.
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