Question

explain why Na+ ion is smaller in size than Na atom.. ☺️✌️

Answer 1

The reason for the smaller size of Na+ ions is as follows -

• The sodium atom has eleven electrons while the sodium ion has lost one electron. So, the sodium ion has ten electrons.
• Now the number of protons in the element remains the same, irrespective of its neutral or ionic state. The number of protons in sodium is eleven.
• Now, when the electron is lost, the radius of the sodium ion decreases.
• This further causes increased force of attraction of protons on electrons. The force of attraction causes the shrinkage and hence, the sodium ion is smaller in size in comparison to the sodium atom.
• Sodium is the 11th element in the periodic table. It is an s-block element and metallic.
• It is an alkali metal and forms a basic oxide on reaction with water.

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