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Q.1. (1) An element X (atomic number 17) reacts with an element Y (atomic number 20) toform a divaient halide.(a) Where in the periodic table are elements X and Y placed ?(b) Classify X and Y as metal(s), non-metal(s) or metalloid(s).(c) What will be the nature of oxide of element Y ? Identify the nature of bonding inthe compound formed.(d) Draw the electron dot structure of the divalent halide. (ii) Arrange the following elements in the increasing order of their metallic character:Mg, Ca, K, Ge, Ga​

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Answer:
1.
(i)
(a) X is in Group 17, period 3 and Y is in group 2. period 4

(b)X is a non-metal,wheareas Y is a metal

(c)Oxide of elements Y would be basic.This compound is formed by ionic bond.


(ii) The increasing order of the metallic character is:
Ge
The electron dot structure of the divalent halide is given below

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