Look at the group 1 of the Mordern Periodic Table, and name the elements present in it.

How many groups are there in the Modern Periodic Table?

Name two purines present in DNA.

If you look at the long form of the Periodic Table, you will find that the elements Li, Be, B,C,N,O,F and Ne are present in the second period. Write down their electronic configuration.

In the modern Periodic table, which are the metals among the first ten elements?

How many periods are there in the Modern Periodic Table?

Name the emulsifying agent present in milk.

All elements in a group of the periodic table have the equal

Nitrogen and phosphorus belong to group 15 of the periodic Table. Write the electronic configuration of these two elements.

In group 14 of the periodic table, why the tendency of Catenation of elements decreases with in creasing atomic number?