Question

Name the properties of the elements which,

(b) decrease in going from left to right in a period.

Answer 1

Metallic character - decreases in going from left to right in a period

1. As we go from left to right in the periodic table, the metallic character decreases. because the elements receive electrons quickly to fill their valence shells.
2. $$\begin{gathered} {\mathrm{X}}^{}+{\mathrm{e}}^{-}\to {\mathrm{X}}^{-} \\ \mathrm{Element}\mathrm{Anion} \end{gathered}$$
3. As a result, these elements gain the nonmetallic property of producing anions.
4. The metallic property reduces as we go up the table, due to the higher pull of the nucleus on the valence electron.
5. This increased attraction makes it more difficult for atoms to release electrons and create cations.
6. Thus the metallic character decreases when we move from left to right in the period.