14. Elements whose outer most shell electrons fall in the f- orbital are called
A. Transition elements B. Metallic elements C. Rare-earth metals D. Alkaline earth metals
15. 1680, 1780 and 1880 are isotopes of oxygen, the number of neutrons of the isotopes respectively
are? A. 16, 17, 18
B. 10, 9, 8
C. 8, 9, 10
D. 18, 17, 16
16. The difference between a galvanic and electrolytic cell is that, unlike the electrolytic cell the
galvanic cell? A. is used in the production of metal from their ores
B. is used in electroplating process
C. uses electrical energy to bring about a chemical change
D. has a spontaneous redox reaction