Go through the Modern periodic table (fig2.1) and write the names one below the other of the elements of group 1. What similarity do you find in their electronic configuration?

Go through the Modern periodic table (fig2.1) and write the names one below the other of the elements of group 1. How many valence electrons are there in each of these elements ?

On going through the Modern periodic table (fig2.1) it is seen that the elements Li,Be,B,C,N,O,F and Ne belong to the period -2. Write down the electronic configuration.

On going through the Modern periodic table (fig. 2.1) it is seen that the elements Li,Be,B,C,N,O,F and Ne belong to the period - 2. Write down the electronic configuration. Is the number of shells the same in these?

On going through the Modern periodic table (fig. 2.1) it is seen that the elements Li,Be,B,C,N,O,F and Ne belong to the period - 2. Write down the electronic configuration. Is the number of valence electrons same for all these elements ?

By referring to the modern periodic table, find out the group to which the above elements belong.

Name the following: The elements in periods 2 and 3 having stable electronic configuration.

Write the electronic configuration of group 2 elements.

Assign the position of the element having outer electronic configuration (n - 1 ) d^2ns^2 for n = 4

Observe the following diagram and write the answers of the following question After completion of a period, what change does take place in the electronic configuration of the next element?

Answer the following questions: Observe the following diagram and write the answer the following questions: After completion of a period , what change does take place in the electronic configuration of the next element?