1) Substances made only of one type of atom are called a) Mixtures b) Elements c) Compounds d) Isotopes 2) These substances are made from more than one type of atom and easy to separate a) Mixtures b) Elements c) Compounds d) Isotopes 3) CO2 and NaCl are examples of  a) Mixtures b) Elements c) Compounds d) Isotopes 4) These subatomic particles have a relative mass of one a) Protons b) Neutrons c) Electrons 5) These subatomic particles have a charge a) Protons b) Neutrons c) Electrons 6) The noble gases a) Have a full outer electron shell b) Have 7 electrons in the outer shell c) Have one electron in the outer shell d) Are highly reactive metals e) Are unreactive f) Are highly reactive non metals 7) Isotopes have a varying number of a) Protons b) Electrons c) Neutrons 8) The mass number of an element is the number of a) Protons and electrons b) Neutrons and electrons c) Protons and neutrons 9) Approximately how many times smaller is the radius of the nucleus than the radius of the atom? a) 100 b) 1,000 c) 10,000 d) 100,000 10) Identify the correct statements a) The nucleus has a negative charge b) The nucleus has a positive charge c) The atom is neutral overall d) The atom has a positive charge e) The atom has a negative charge f) The nucleus is neutral overall

Atomic structure

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