1) The number assigned to an element indicating the number of protons in an atom a) atomic mass b) atomic number c) atomic model d) valence electron 2) A drawing showing the number of protons and electrons in an atom. a) atomic mass b) atomic number c) atomic model d) valence electron 3) The outermost negatively charged particle in an atom a) valence electron b) electron c) proton d) nucleus 4) The innermost part of an atom made of protons and neutrons. a) valence electron b) electron c) proton d) nucleus 5) The “rings” around the nucleus of an atom where electrons “live”. a) atomic mass b) electrons c) shells d) valence electron 6) A drawing that shows the number of valence electrons in an atom a) atomic model b) shells c) atomic number d) Lewis structure 7) The negatively charged particle in an atom a) atom b) proton c) neutron d) electron 8) A naturally occurring, pure substance a) element b) proton c) atom d) electron 9) A table organized by the characteristics of atoms a) Table of Elements b) Periodic Table of Elements c) Swigert's Table d) Periodic Table 10) The unit of measurement for the mass of a proton and neutron. a) atomic mass unit b) atomic grams c) atomic mass d) proton surplus 11) The total mass of an atom; the mass of protons and neutrons added together a) atomic mass unit b) atomic grams c) atomic mass d) proton surplus 12) Positively charged particles in an atom; the number determines the element a) neutron b) element c) electron d) proton 13) Neutral charged particles that help hold the nucleus together. a) neutron b) element c) electron d) proton 14) Two or more atoms combined to form a substance a) atomic structure b) molecule c) nucleus d) atom 15) The smallest unit of an element that is still considered that element. a) atomic structure b) molecule c) nucleus d) atom 16) A version of an atom of an element that has different amount of neutrons a) atomic structure b) isotope c) nuclei d) ion

Chemistry Terms

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