Write the outer electron configurations for the (a) alkali metals, (b) alkaline earth metals, (c) halogens, (d) noble gases.
CEM 141 Lecture 23 – Nuclear Reactions and Bonding Dr. Jian Hu 26 October 2016 Energy changes in nuclear reactions Nuclear reactions have changes in mass (mass defect), but in chemical reactions, mass is conserved Mass-energy equivalence E=mc (Einstein) – E represents the “binding energy” that gets released when mass is converted to energy – m represents the mass in kg – c represents the speed of light (3x10 m/s) Mass defect: mass of the individual nucleons is greater than the mass of the product – mass defect is the difference the mass of the nucleons and the mass of the atom Mass defect = binding energy Practice: Each deuterium atom is formed by 1 proton, 1 neutron, and 1 electron. How much energy is released b
