Question

The grid below is part of the periodic table. Use it answer the questions that follow. (The letters are not the actual symbols of the elements).

1. Which is the most reactive non-metallic element shown in the table? Explain.
2.  
   1. Write the formula of the compound formed when element A reacts with element B. 
   2. Name the bond type in the compound formed in b (i) above. 
3. What is the name given to the group of elements where C, G and H belong?
4. The melting points of elements F and G are 1410 0C and -101 0C respectively. In terms of structure and bonding, explain why there is a large difference in the melting points of F and G. (2 marks)
5. D forms two oxides. Write the formula of each of two oxides. (1 mark)
6. J is an element that belongs to the 3rd period of the periodic table and is a member of the alkaline earth elements. Show the position of J in the grid.

Answer 1

1. C- has the highest afinity for an electron.
2.  
   1. AB₂  or AB
   2. Covalent Bond.
3. Halogens
4.  
   1. Element F has a giant atomic structure which requires a lot of energy to break its bond.
   2. Element C has very weak van der waals forces which requires very little energy to break its bond.
5. D₂O and D₂O₂ 
6.