Question

give reason for metal form positive ions​

Answer 1

Ions are electrically charged particles formed when atoms lose or gain electrons. They have the same electronic structures as noble gases.  

So, Metal atoms form positive ions.

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Answer 2

Explanation:

Metals form positive ions because metals are very electropositive, and their outer electrons are very loosely bunded on them. so, that they lose electrons and gain a positive charge and hence from positive ions.