Words must be remembered Element,元素 Isotope,同位素 Hydrogen,氢 Uranium,铀 Radioactive,ad,放射 性的 Fissile,ad,易裂变的 Emission,n.发射 Decay,v,n,衰变 Radiation,n,放射性, 放射,射线
Words must be remembered • Element, 元素 • Isotope，同位素 • Hydrogen, 氢 • Uranium, 铀 • Radioactive, adj.,放射 性的 • Fissile, adj.,易裂变的 • Emission, n.发射 • Decay, v., n., 衰变 • Radiation， n., 放射性， 放射，射线
Mass Defect质量亏损 The principle of the equivalence of mass and energy E=mc where c, the speed of light, is 2.998X 108 m/s
Mass Defect 质量亏损 • The principle of the equivalence of mass and energy: where c, the speed of light, is 2.998×108 m/s 2 E mc