Advertisements
Advertisements
Question
State the modern periodic law for the classification of elements. How many (i) groups and (ii) periods are there in the modern periodic table?
Advertisements
Solution
Modern Periodic Law:
The physical and chemical properties of elements are a periodic function of their atomic numbers.
- There are 18 vertical columns called groups (numbered from 1 to 18).
- There are 7 horizontal rows called periods (numbered from 1 to 7).
RELATED QUESTIONS
How many periods and groups are there in the long form of periodic table?
Give two example of group 17 elements.
Give two example of group 18 elements.
Which element has two shells, both of which are completely filled with electrons?
Define:
Periodic table
Name the metals in the first twenty elements.
Name the following:
The group of the Modern Periodic Table to which calcium [Ca2+] belongs.
Write a scientific reason.
Lithium and sodium are included in the same group in the periodic table.
Which one of the following elements exhibit maximum number of valence electrons?
1H2 is an isotope of hydrogen. In the modern Periodic Table it will ______.
