(a) Explain briefly why \(_2^4He\) has a stable electron configuration compared to \(_4^9Be\) 
(b) Consider the following elements: 1H and 3Li.
(i)  State the number of electrons that an atom of each element would have after forming an ionic bond.
(ii)  Give a reason for each of your answers stated in (b)(i).               
(c)  State two factors that should be considered when siting a chemical industry.

(d) State two advantages of using a catalyst instead of high temperatures in chemical reactions. 
(e)     Turpentine burns in chlorine according to the following equation:
C\(_{10}\)H\(_{16}\)\(_{(I)}\)    +    8Cl\(_{2(g)}\) \(\to\)     10C\(_{(s)}\)   +    16HCl\(_{(g)}\)
Calculate the mass of turpentine that would completely burn in 21.3 g of chlorine.
[Molar mass of chlorine = 71 gmol\(^{-1}\); Molar mass of Turpentine = 136 gmol\(^{-1}\)]

(f)  What is cracking?                                                                                      

(g) State two factors that may influence the value of electron affinity.

(h) What are carbohydrates?                                                                          

(i) State two differences between a simple sugar and starch.                     

 

(j) Write an equation to show the dissociation of each of the following acids:
(i) H\(_2\)CO\(_3\);
(ii) CH\(_3\)COOH.