Advertisements
Advertisements
प्रश्न
State what the group number in the Modern Periodic Table signifies. Give a reason why elements in the same group, have similar valency and similar chemical properties.
उत्तर
Group number signifies the number of electrons in the outer shell of an atom of the element.
- Number of electrons in the outer shell of all elements in a group is the same.
- Hence all elements in the same group of the periodic table have the same ‘Valency’ and similar ‘Chemical properties’.
APPEARS IN
संबंधित प्रश्न
Nitrogen (atomic number 7) and phosphorus (atomic number 15) belong to group 15 of the Periodic Table. Write the electronic configuration of these two elements. Which of these will be more electronegative? Why?
Fill in the following blank with suitable word:
The basis for modern periodic table is ...............
What is the significance of atomic number in the modern classification of elements? Explain with the help of an example.
Explain why All the elements of a period have different chemical properties.
What are the groups in a periodic table? Give two characteristics of each.
What is meant in the periodic table by a period?
In the modern periodic table, the positions of 1 to 20 elements are shown here. Identify the elements A and B. Write their atomic number.
What are groups and periods in the modern periodic table?
______ forms the basis of the modern periodic table.
Which of the following elements would lose an electron easily?
