ACS Chemistry general Exam questions with correct answers

Layout of an element (mass # & atomic #) CORRECT ANSWER atomic number = CORRECT ANSWER # of protons mass number = CORRECT ANSWER # of protons + neutrons the number of protons in a neutral atom will equal the CORRECT ANSWER # of electrons how to find the correct number of neutrons CORRECT ANSWER mass number - atomic number Forms of the same elements that differ in amount of neutrons CORRECT ANSWER isotopes What particle, if lost from the nucleus, would NOT cause a change in the atomic number? CORRECT ANSWER a neutron because it has no charge When alpha particles were shot at a metal foil target, most passed through without deflections, while others deflected at large angles. What did this suggest to Rutherford? CORRECT ANSWER that the atoms of the metal were mostly empty space, while the nucleus consisted of most of the mass which included highly condensed positive particles (w