Question

potassium more reactive than sodium why​

Answer 1

Potassium has one extra full electron than the noble gas electronic configuration between the nucleus and the outermost electron. Thus, in potassium, the outermost electron is better shielded from the attractive force of the nucleus. This means, potassium is more reactive than sodium.

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Answer 2

here is your answer mate

This is todo with the structure of the atoms. Both are in Group 1 of the periodic table so have one valence (outer) electron which is relatively easy to lose due to a factor known as shielding (I can add more detail here if needed) and the desire to acquire a ‘noble gas configuration’.

As potassium is larger than sodium, potassium’s valence electron is at a greater distance from the attractive nucleus and is so removed more easily than sodium’s valence electron. As it is removed more easily, it requires less energy, and can be said to be more reactive.

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