Question

4. What is screening effect ?
5. Write IUPAC name of compound with atomic
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Answer 1

4.The outer electron experiences two opposing forces-

Force of attraction from nucleus.

Force of repulsion from inner electrons.

The decrease in the force of attraction exerted by the nucleus on the valency electrons due to the presence of electrons in the inner shells, is called the screening effect or shielding effect.

The screening effect increases if the number of electrons in the inner shells between the nucleus and the outermost electrons increases.

Order of screening effect-

s-orbital>p-orbital>d-orbital>f-orbital.

5. Hassium is a synthetic chemical element with symbol Hs and atomic number 108. It is named after the German state of Hesse.