How do you calculate the valency of an element from its electronic configuration?

What elements has the electronic configuration 2, 8,2?

How will you calculate pH using Hydrogen electrode?

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

Write the general electronic configuration of P-block elements.

Write the general electronic configuration of f-block elements.

Which is the last element in the series of the actinoids? Write the electronic configuration of this element. Comment on the possible oxidation state of this element.

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.

What do you understand by electron affinity of an element ? Why electron affinity of chlorine is more than that of fluorine.

What are transition elements? Give the general electronic configuration of transition elements.