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Name the 3 atomic number of lithium​

User Wlredeye
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It has only one atomic number and that’s 3
User Sadeniju
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Lithium with atomicnumber 3 and potassium with atomic number 19 are placed in same group because they are having the same number of valence electron that is 1 . The first and second element in the the second group will be beryllium and magnesium with atomic number 4 and 12 respectively.

I hope my answer will help you

User Bhuga
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