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

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

Explain briefly how +2 state becomes more and more stable in the first half of the first row transition elements with increasing atomic number?

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

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

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

Write the electronic configuration of the element with atomic number 102?

Write the highest oxidation state of element with atomic number 23.

Write the electronic configuration of the elements with the atomic numbers 61, 91, 101 and 109.