49.True-False: An atom contains 12 protons and 12 neutrons, : 1409662
49.True-False: An atom contains 12 protons and 12 neutrons, and a different atom contains 10 protons and 12 neutrons. These two atoms are not isotopes.
50.True-False: The isotope of hydrogen that is a radioisotope has a mass number of 3.
51.True-False: Calcium is a transition metal as is indicated by its location in the periodic table.
52.True-False: Emission of a beta particle increases the number of protons in an atom's nucleus.
53.True-False: In fission, an atom’s nucleus splits to produce two smaller nuclei, a number of neutrons, and energy.
54.True-False: Neutrons must NOT collide with atomic nuclei for fission to take place.