Metallic character goes on decreasing while going from left to right in period ( give scientific reason)​

Spontaneity tell us the direction of the reaction, but not how fast it goes. gibbs free energy brings together enthalpy, entropy and temperature in one easy formula. g = h - ts. and, finally the sign of delta g is always negative for a spontaneous reaction.

They are like other investigations? say there was a murder u have to do blood test and finger prints which run through a lab. 

Decomposition is the cycle at which bacteria breaks down any organic material into the soil

13) a 14) a15) b16) i don't know sorry17) a (maybe)