Q2B / Complete the following: ( 15 marks)
1-Advanced materials are ............ , .......... ,............. , and ...............
2-As the atomic number is increased, the melting point is..................
3 -Covalent bond is very strong because..................
4- The relationship between vacancies number and tem.is.................
5- Nano- fibers are used for ............., ..............,and ...............
6-The difference between soft and permanent magnets is......................
7- Cast iron has lower toughness than steel because..................
8-Cobalt has density of ......, melting temp. of ...... andcan be classified to........
9- Cermets mean ..................
10-Exrinisic has energy gap of .................ev
