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The table below gives the number of protons and neutrons in element G,H,I and J.

 Element  G  H  I  J 
 Number of protons  3 17  19  19
 Number of neutrons  4 20 18 22 
  1. Which atoms isotopes of the same element?
  2. Which atoms have the same mass number 
  3. Write formula of the compound formed between G and H 

1 Answer

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  1. I and J
  2. H and I
  3. 2G(s) + H2(g) → 2GH(g)
    Or
    2Li(s) + Cl2(g) → 2LiCl(s)
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