Define Mendeleev's Periodic Law and describe the essential features of Mendeleev’s Periodic
table?
Answers
Explanation:
The physical and chemical properties of the elements are the periodic functions of their atomic numbers
construction of long form of periodic table:
Based on the mordern periodic law, the mordern periodic table is proposed .
This periodic table is also known as long form of periodic table .
Long from of periodic table is the graphical represented by aufbau principal .
The mordern periodic table has 18 vertical columns called groups 7 horizontal rows known as periods .
There are 18 groups, represented by using roman numerals 1 to 8, with letters A and B in traditional notation (or) 1 to 18 by Arabic numerals.
There are 7 periods . these periods are represented by Arabic numerals 1 to 7.
The number of main shells present in the atom of the particular atom decides to which period it belongs.
First period consists 2 elements, 2nd and 3rd periods contains 8 elements each, 4th and 5th periods contains 18 elements each, 6th period contains 32 elements and 7th period is in complete.
The elements are classified into s, p ,d and f block elements.
Inert gases are placed in 18th group.
Answer:
Mendeleev's periodic law states that; The physical and chemical properties of elements are a periodic function of their atomic mass.
The periodic table is composed of seven horizontal rows or periods and is numbered between 1 to 7. There is a regular gradation in the properties of elements in the horizontal rows(periods) from left to right. The periodic table is composed of eight vertical columns or groups. They are numbered between 1 to 8.