What is used to define the atomic number of an element? its number of protons true its number of neutrons false its number of electrons false its order in the periodic table false Single What is the atomic number of an element with 120 neutrons? 60 false 100 false 120 false cannot be determined true Single In which part of the atomic symbol is the mass number written? upper left corner true upper right corner false lower left corner false lower right corner false Single How many neutrons are in the element with the atomic symbol ₁₄₆C? 0 false 6 false 8 true 14 false Single Which of the following purposes is the isotope Cobalt-60 used for? leukemia diagnosis false anemia diagnosis false tumor irradiation true production of astatine false Single Which of the following statements best describe what isotopes are? They are atoms of the same element but lack electrons false They are atoms of the same element but have excess protons false They are atoms of the same element but have different mass number true Isotopes are used for carbon dating objects false Single What trait distinguishes a positron from an electron? They differ in mass false They differ in speed false They differ in charge true They differ in direction false Single What type of particle did Rutherford use in his famous gold foil experiment that led to the discovery of the proton? photon false positron false ₄₂He true electron false Single What is the heaviest possible element that can be produced by nuclear fusion inside a low to medium-mass star such as the Sun? uranium false lead false iron false carbon true Single What company did the dictatorial Marcos regime commission to build the Bataan Nuclear Powerplant? Rosatom State Nuclear Energy Corporation false General Public Utilities (GPU) Corporation false General Electric (GE) false Westinghouse Electric Corporation true Single