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प्रश्न
An element 'M' has atomic number 11.
(a) Write its electronic configuration.
(b) State the group to which 'M' belongs.
(c) Is 'M' a metal or a non-metal.
(d) Write the formula of its chloride.
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उत्तर
Atomic number of ‘M’ = 11
(i) Electronic configuration : 2, 8, 1
(ii) Since, the valence shell contains 1 electron, it belongs to group 1.
(iii) M is a metal.
(iv) The formula of its chloride is M Cl.
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