1.

The number of electron and proton in the third alkaline earth metal ion will be

Answer»

`e/20,p/20`
`e/18,p/20`
`e/18,p/18`
`e/19,p/20`

Solution :The thid alkaline earth metal ION is `CA^(2+)` hence it CONTAINS 20 PROTON and 18 electron


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