this slide state the periodic table and the types of the periodic table.

1. Periodic Table
Name-Shiva Tripathi
Course-BSC Chemistry
Amity Institute of Applied
Science
Amity University, Uttar
Pradesh Lucknow,

2. Defintion
 The periodic table is the tabular arrangement of all the chemical
elements on the basis of their respective atomic numbers.
 In the periodic table, the vertical columns are called ‘groups’ and the
horizontal rows are called ‘periods’.
 The modern periodic table is based on the modern periodic law put
forward by the English physicist Henry Moseley, which states that “the
properties of elements are periodic functions of their atomic numbers”.
 Periodic trends in the properties of the elements can be observed
down the groups and across the periods of the modern periodic table.

3. History
 Since the ancient period, scientists have
suggested various forms of the periodic table.
 but the credit for the modern form of periodic table
goes to the Russian chemist, Dmitri Ivanovich
Mendeleev.
 However, with the discovery of new elements and
new theories on the structure of atoms; the basic
structure of Mendeleev’s original periodic table has
undergone several changes.

4. Aristotle’s
Theory

5. Concept of Laws of
Triads

7. Mendeleev's periodic table
 The renowned Russian professor Mendeleev developed his
periodic table in 1869.
 Mendeleev’s conceptualization of the periodic table was far
more superior than any of the periodic tables developed in
his time.
 It was very systematically devised with a lot of clarity and
consistency.
 He kept some of the cells in his table empty, to
accommodate the missing elements, which he believed
would be discovered in future.

9. Modern Form of Periodic Table
 There are a total number of 118 chemical elements in the
periodic table.
 Out of them, 94 elements are found naturally on the surface
of the earth and the rest are all synthetic elements.
 Usually, each element in the periodic table is represented
with its symbol, atomic number and atomic mass.
 However, there are a few synthetic elements placed in the
seventh period of the table which are unnamed and are
represented with their temporary names.
 These elements were discovered in the recent times and
will receive their permanent names and symbols from
International Union of Pure and Applied Physics (or
IUPAC).