Question

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.

Answer 1

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.