1) the smallest unit of an element that has all the properties of that element a) atom b) molecule c) electron d) neutron 2) two or more atoms linked together to form the smallest unit of an element or compound a) atom b) electron c) molecule d) neutron 3) a subatomic particle with a negative charge a) atom b) neutron c) molecule d) electrons 4) a subatomic particle with no charge a) atom b) nucleus c) electron d) neutron e) proton 5) a subatomic particle with a positive charge a) electron b) neutron c) proton d) nucleus 6) a substance made of the atoms of two or more different elements a) atoms b) molecule c) compound d) periodic table 7) the center of an atom a) neutron b) electron c) proton d) nucleus 8) an organizational tool used by scientist to order the elements by atomic number and similar properties a) chemical symbol b) periodic table c) periodic electron d) periodic elements 9) a substance made up of only one kind of atom a) element b) chemical symbol c) proton d) periodic table 10) one or two letters that represent the name of an element a) chemical symbol b) atomic mass c) atomic weight d) periodic table 11) equals the number of protons in an atom's center a) element symbol b) atomic number c) atomic mass d) periodic table 12) equals the number of protons plus the number of neutrons in a single atom a) element symbol b) atomic number c) atomic mass d) periodic table 13) combination of two or more substances in which each substance keeps its own characteristics a) compound b) mixture c) solution d) atom 14) mixture of two or more substances that stay evenly mixed a) compound b) molecule c) solution d) atom 15) a particular kind of matter with constant properties a) substance b) mixture c) solution d) molecule 16) particle that composes an atom a) substance b) solution c) molecule d) subatomic

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