Do all systems have energy?

Which type of fossil does this image depict?

Use the periodic table to complete this equation that represents nuclear fission processesun - ba c 3 n

Which statement best summarizes the importance of ernest rutherford’s gold foil experiment? it proved that all of john dalton’s postulates were true. it verified j. j. thomson’s work on the atomic structure. it showed that an electron circles a nucleus in a fixed-energy orbit. it showed that a nucleus occupies a small part of the whole atom.