Approximately how old is a fossil that contains 3.13% of its original carbon-14? the half-life of carbon-14 is 5730 years. a) 2870 yearsb) 5730 yearsc) 11,500 yearsd) 22,900 yearse) 28,700 years

3.09 lab: reaction of metals 1 which combinations of substances resulted in a chemical change? for each metal that participated in a chemical change, write the type of metal it is, based on your examination of the periodic table. were there any metallic compounds that did not react with either the acid or the base? write the type of metal, based on your examination of the periodic table. make a general statement about the reactivity of the metals in this experiment.