1) The atomic number is determined by the number of a) protons b) neutrons c) electrons 2) The mass number is determined by the number of a) protons and electrons b) protons and neutrons c) electrons and neutrons 3) The atomic number of oxygen is 8 and its mass number is 16.The number of protons present in oxygen is a) 8 b) 16 c) 24 4) Based on number 3, the number of neutrons present is a) 8 b) 16 c) 24 5) 5. A certain element has an atomic number of 20 and mass number 45. Determine the number of protons, electrons and neutrons present in the element. a) 25 protons, 25 electrons , 20 neutrons b) 20 protons, 25 electrons, 25 neutrons c) 20 protons, 20 electrons, 25 neutrons

ATOMIC NUMBER/MASS NUMBER

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