For a science experiment, a student rubs a mineral against a porcelain plate. the students has just performed
a) an acid test.
b) a streak test.
c) a hardness test.
d) a fracture test.

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.