Elements X and Y have 5 and 7 valence electrons.
a) Predict the nature of elements - whether metals or non metals.
b) What is the nature of the molecule when these combine?
c) Draw the structure of the molecule.
d) What is the valency of X in the molecule?
e) Predict its physical state.

1. They both are non-metals.

2. They both form covalent bonds.

3. XY3 is the molecule so formed.

4. Valency of X is 3 as it required three electrons to complete its octet.

5. It is gaseous in nature.

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abcd
 
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  1. Non metals 
  2. Covalent compound. 
  3. XY3 
  4. 3
  5. It can be gas, solid or liquid. 
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