1. Inorganic Chemistry May 12, 2015

2. Describe how the strong force attracts nucleons Relate binding energy and mass defect Predict the stability of a nucleus by considering factors such as nuclear size, binding energy, and the ratio of neutrons to protons in the nucleus

3. Nucleons and nuclide

4. Protons and neutrons are nucleons A specific number of protons and neutrons are described as a nuclide An isotope has the same atomic number but different mass number Isotopic notation Mass #25 Mg Chemical Symbol Atomic #12

5. Strong force exists when nucleons are close together The strong force must overcome the electrical charge of the protons Three quarks make up nucleons Quarks are in flavors

6. Binding energy and Mass Defect separate nucleons  nucleus + energy Nuclear binding energy is the energy associated with the loss of mass, mass defect, from the combining of nucleons E o = mc 2 2.73 x 10 12 J/mol 4 2 He

8. 1. Except for 1 1 H and 3 2 He, all stable nuclei have a number of neutrons that is equal to or greater than the number of protons A nucleus that has an N/Z number that is too large or too small is unstable. Gradual increase from 1 to 1.5 Nuclei with even number of neutrons and protons are more stable Nuclei that have magic numbers of protons and neutrons [2,8,20,28,82,&126]

9. 1-12 Skip 2’s page 647 1-9 Skip 2’s page 874 Mass of a proton 1.672614 x 10 -27 kg Mass of a neutron 1.6749543 x 10 -27 kg Speed of light 3.00 x 10 8 m/s