a. Specify the number of protons, neutrons, and electrons in the neutral atom bromine-80. Enter your answers as integers separated by commas.
b. The ion O-2 has ___ protons and ___ electrons. Enter your answers as integers separated by a comma.
c. What isotope has 13 protons and 14 neutrons? Enter the name of the element followed by a hyphen and the mass number (e.g., uranium-234).
d. Which element does represent in the following expression: 41/20 X? Enter the chemical symbol of the element.
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