Multiple ChoiceAn atom has a mass number of 30 and contains 16 neutrons. What is the atomic number of this atom?54views
Multiple ChoiceWhich of the following best describes the difference between a molecule and an atom?36views
Multiple ChoiceWhich of the following is the smallest particle of an element that still retains all the chemical properties of that element?55views
Multiple ChoiceIf atom X has an atomic number of 74, which of the following statements is correct?74views