6. a) name two elements whose properties were correctly predicted by mendeleev. b) mention their present day name. c) what is their position in modern periodic table? d) classify them as metal, nonmetal or metalloid?

Acertain reaction has a activation energy of 54.0 kj/mol. as the temperature is increased from 22c to a higher temperature, the rate constant increases by a factor of 7.00. calculate the higher temperature. c (report only numerical answer)