Question

Metallic character goes on decreasing while going from left to right in a period. Write scientific reasons for it.

Answer 1

In a periodic table, electrons are added in the shells but the number of shells remain constant. Metals have a tendency to lose electrons. Thus, when electrons are added the size of atoms decreases.

Due to the increased nuclear pull, it becomes difficult for the elements to lose electrons. Thus, the metallic charge goes on decreasing, when we move from left to right in a periodic table.

Answer 2

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✍️ Metallic character of an atom is it's tendency to lose electrons.

✍️ While going from left to right in a period, electrons are added to the same outermost shell. At the same time, protons get added to the nucleus increasing the nuclear charge.Hence, these electrons experience greater pull from the nucleus due to increased effective nuclear charge.

✍️ As a result, it becomes difficult to remove a valence electron from the atom.

Hence, metallic character goes on decreasing while going from left to right in a period.