Which is an example of the strong force in action?

a battery-powered radio produces sound.
a magnet keeps a cabinet door closed.
the sun pulls on earth as earth moves around the sun.
the protons in the nucleus of a carbon atom are held together.

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.