Nuclear Chemistry (Chapter 18) Flashcards
Nucleon
referring to a particle in the nucleus
Nuclide
applied to a specific nucleus with a given # of protons and neutrons (AKA an isotope)
Strong Force
attractions between nucleons that binds them together (only acts over small distances)
Quarks
particles that make up protons & neutrons
Flavors of quarks
- Up (+2/3 charge)
- Down (-1/3 charge)
- Top
- Bottom
- Strange
- Charm
Protons contain…
2 up & 1 down quarks
Neutrons contain…
1 up & 2 down quarks
Strong forces are formed by…
down & up quarks attracting each other
Nuclear Binding Energy
energy released when nucleons come together
separate nucleons —> nucleus & lots of energy
Mass defect
the difference between the mass of an atom and the sum of the masses of the atom’s particles (protons, neutrons, electrons)
Small nuclei need an N/P ratio of…
1:1 to be stable
Large nuclei need a N/P ratio of…
1:1.5 to be stable
Nuclei with mass # greater than…
209 are never stable
Nuclei with atomic # > …
83 are never stable
Transmutation
a nuclear reaction where 1 element changes into another