Comlete the following table:
Make a list of elements in the mono-atomic and in the di-atomic molecular state.

Comlete the following table: Complete the following chart: , .

Comlete the following table: The relative atomic masses of some elements in the chart below are given. You have to find the relative atomic masses of the others.

Answer the following questions: State the number of elements in the modern periodic table..

The element having atomic number 92

Name the element having the simplest atomic structure in the periodic table.

State whether the following statements are True or False: Elements are classified on the basis of their atomic numbers.

How do atoms of an element exist in nature ?

State whether the following statements are True or False: Mendeleev arranged elements in the increasing order of their atomic masses.

In the following table, six elements A, B, C, D, E and F (here letters are not the usual symbols of the elements) of the modern periodic table with their atomic numbers are given. Write the electronic configuration of C and E.

In the following table, six elements A, B, C, D, E and F (here letters are not the usual symbols of the elements) of the modern periodic table with their atomic numbers are given. If B combines with F, what would be the formula of the compound formed?