- Question Explain Why There Exists Such Reactivity Pattern Of The Metals In The Periodic Table As Described Above 1 (32.84 KiB) Viewed 12 times
The following are examples of reactivity-patterns of some metals: Metals that react with cold water: Li, K, Na, Ca, etc. Metals that do not react with cold water but with hot steam: Mg, Al, Zn, Cr, etc. Metals that neither react with cold water nor with hot steam, but with acids: Co, Ni, Sn, Pb, etc. These reactivity-patterns of the metals listed above are in line with the metal's reactivity-trend described in Question #1 above. For instance, since K is more reactive than Al (again according to the trend described in Question #1), K can easily react even with cold water. However, Al can't react with cold water; Al can only react with hot steam because Al is less reactive than K. You can also draw a similar reasoning if you compare, for instance, Al with Pb. Al can react with hot steam. However, Pb can't react with hot steam; Pb can only react with acids (i.e. only with such chemicals as acids!) because Pb is less reactive than Al. The following two pictures show the reactions of sodium (Na) and magnesium (Mg) with H₂O. The top picture (a) shows a greater (faster) extent of reaction with H₂O than the bottom picture (b). Here are the two questions: 1. Match the top and the bottom pictures with the respective elements. 2. What state is the H₂O in each case, i.e., cold water or hot steam?