The atomic number of an element is 20.(a) Write its electronic configu

1.	The atomic number of an element is 20.(a) Write its electronic configuration and determine its valency.(b) It it is metal or a non-metal ?(c) Write the formula of its chloride ?(d) Is it more reactive or less reactive than Mg (atomic number 12) ? Give reason for your answer.
Answer» (a) X₍₂₀₎-2,8,8,2 Valence electrons- 2 Hence valency is 2 (b) It is a metal (c) XCl₂ (d) It is more reactive than Mg as reactivity increases down the group Mg- III Period And X₂₀ (Ca)- IV Period

The atomic number of an element is 20.(a) Write its electronic configuration and determine its valency.(b) It it is metal or a non-metal ?(c) Write the formula of its chloride ?(d) Is it more reactive or less reactive than Mg (atomic number 12) ? Give reason for your answer.

Answer»

(a) X₍₂₀₎-2,8,8,2

Valence electrons- 2

Hence valency is 2

(b) It is a metal

(d) It is more reactive than Mg as reactivity increases down the group Mg- III Period And X₂₀ (Ca)- IV Period