1) What is the mass and charge of a proton? a) 1 amu, positive b) 1 amu, neutral c) 1 g, positive d) 1 g, neutral 2) Which statement describes the location of the parts of an atom? a) Protons, neutrons, and electrons are located in the nucleus. b) Electrons orbit the nucleus in shells at fixed distances c) Atoms are hard, indivisible spheres. d) Electrons are located in regions called shells or orbitals 3) Which statement describes the mass of the subatomic particles? a) Protons and neutrons have the same mass. b) Protons and electrons have the same mass. c) Neutrons and electrons have the same mass. d) All subatomic particles have the same mass 4) What subatomic particles are found in the nucleus? a) protons and electrons b) protons and nucleons c) protons and neutrons 5) Which describes the charge of the neutron. a) Neutron is negative b) Neutron is positive c) Neutron is neutral 6) What can be determined if only the atomic number of an atom is known? a) the total number of neutrons in the atom b) the total number of protons in the atom c) the total number of protons and neutrons d) the total number of protons or the total number of electrons in the atom 7) The number of protons and neutrons added together a) atomic number b) atomic mass c) element symbol 8) Which particle has no mass that is not found in the nucleus? a) electron b) proton c) neutron 9) An atom is electrically neutral because the a) number of protons equals the number of electrons b) number of protons equals the number of neutrons c) ratio of the number of neutrons to the number of electrons is 1:1 d) ratio of the number of neutrons to the number of protons is 2:1 10) Which two particles make up most of the mass of any atom? a) electron and neutron b) electron and proton c) proton and neutron 11) Experimental evidence indicates that the nucleus of an atom a) has a negative charge b) contains most of the mass of the atom c) has no charge d) contains a small percentage of the mass of the atom 12) Which particle has the least mass? a) a neutron b) a proton c) an electron 13) Which of the following statements best describes an electron? a) It has a smaller mass than a proton and a positive charge. b) It has a greater mass than a proton and a positive charge. c) It has a greater mass than a proton and a negative charge d) It has a smaller mass than a proton and a negative charge. 14) What particle has a mass of approximately one atomic mass unit and a unit positive charge? a) a neutron b) nucleus c) a proton d) an electron 15) What particle is electrically neutral? a) a neutron b) a nucleus c) a proton d) an electron 16) Which two particles have approximately the same mass? a) neutron and electron b) neutron and deuteron c) proton and electron d) proton and neutron

The Atom

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