The symbol of a simple unprefixed si unit has been left off of each measurement in the table below. fill in the missing unit symbols.
themassofaus=penny 2.5
thelengthofa=car 5.
theworldrecordforthe100m=dash 9.6
thevolumeofwaterinatall=glass

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.