3a specific amount of energy is emitted when excited electrons in an atom in a sample of an element return to the ground state. this emitted energy can be used to determine the(1) mass of the sample
(2) volume of the sample
(3) identity of the element
(4) number of moles of the element

What are the three major branches of natural science? • earth and space science, life science, physical science •earth and space science, physical science, chemistry •physical science, life science, chemistry •life science, chemistry, physics

Enzymes affect the reactions in living cells by changing the

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.