GEOL 1114 Lecture 16: GEOL 1114 - Geologic Time II
Document Summary
Variant of the same parent atom (i. e. same number of protons) Differs in the same number of neutrons. Results in different mass number than parent atom: numerical dating techniques and radioactive decay, unstable nucleus (protons + neutrons, radioactivity, spontaneous changes (decay) in the structure of atomic nuclei, a radioactive parent isotope yields daughter radionuclide. Mass number is reduced by 4 and the atomic number is lowered by 2 (e. g. beta particle emission. An electron (beta particle) is ejected from the nucleus. Neutron converted to proton, atomic number is increased by 1, and the mass: radioactive decay processes, alpha particle emission (cid:1847)(cid:2870)(cid:2871)(cid:2876) (cid:1846) (cid:2870)(cid:2871)(cid:2872)) number remains the same (e. g. (cid:1829)(cid:1871)(cid:2869)(cid:2871)(cid:2875) (cid:1828)(cid:2869)(cid:2871)(cid:2875)) elements (e. g. (cid:1847)(cid:2870)(cid:2871)(cid:2876) (cid:1829)(cid:1871)(cid:2869)(cid:2871)(cid:2875)+(cid:1846) (cid:2877)(cid:2877)+2 (cid:1866)(cid:1873)(cid:1872)(cid:1870)(cid:1867)(cid:1866)(cid:1871), electron capture, spontaneous fission. Electron captured by nucleus and combines with a proton to form a neutron. Atomic number decreases by 1 and the mass number remains unchanged.
