the no of electrons and protons in an atom of third alkaline earth metal is
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20 electrons 20 protons
kumaripooja0252:
how
As we know that alkaline earth metals are metals of group no. Second
These are Beralium,magnesium,calcium,strontium ,barium,radium
So third element is calcium whose atomic no. Is 20...
I hope now u will get it
Answered by
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Third alkaline earth metal is calcium having atomic no. 20.it has 20 electrons and 20 protons
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