Unit 6: Nuclear Chemistry

PSc.2.3.1 :

• Compare the characteristics of alpha and beta particles and gamma rays – composition, mass, penetrability.
• Compare alpha, beta, and gamma decay processes –alpha decay reduces the mass of an atom by 4 and the atomic number by 2; beta decay increases the atomic number by 1 (a neutron decays into a proton and electron); gamma rays are electromagnetic waves released from the nucleus along with either an alpha or beta particle.
• Compare the processes of fission (splitting of a very large atom) and fusion (joining of atoms) in terms of conditions required for occurrence, energy released, and the nature of products.

PSc.2.3.2

• Conceptually explain half-life using models.
• Perform simple half-life calculations based on an isotope’s half-life value, time of decay, and/or amount of substance.