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Class X Sciences

[papers from previous years]

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.


(a)the electronic configuration is 1s²2s²2p⁶3s¹.
(b)the m belongs to 3 rd group.
(c)m is a metal.
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Atomic number-11
(a) electronic configuration -- 2,8,3
(b)group -- 3rd group
(c) M is a metal
(d)formula -- sodium chloride(NaCl)
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