name : 2 element having a single electron in outermost sheel. 2 elements having two electron in outermost sheel. 2 elements with filled outermost sheel.
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1
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single electron: Hydrogen, Lithium
two electrons: Magnesium, Calcium
Three electrons: Boron, Aluminium
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2 elements having a single electron in the outermost shell- Sodium(2.8.1) & Lithium(2.1)
2 elements having 2 electrons in the outermost shell- Magnesium (2.8.2) & Berillium(2.2)
2 elements with filled outermost shell- Neon(2.8) & Argon(2.8.8)
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