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 ?

Go through the Modern periodic table (fig2.1) and write the names one below the other of the elements of group 1.

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?

Answer the following questions: The elements in the second period :Li, Be, B,C,N,O,F and Ne have electrons in the two shells K and L . Write down the electronic configuration of these elements.

Study the below given periodic table in which four elements are indicated by alphabets: A, B, C and D. Identify element 'A' and write its 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 ?

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

Answer the following questions in one word : To which group in the periodic table does the element carbon belong? Write down the electronic configuration of carbon and deduce the valency of carbon.

Study the below given periodic table in which four elements are indicated by alphabets A,B,C and D Identify element 'D' and wrtie its electronic configuration Also write the electronic configuration of the elements above and below 'D' in the same group