BIOL 1117 Lecture 4: Lecture 4 Notes
4 Jan 2018
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Document Summary
Isotopes are different types of elements that differ just in the number of neutrons: any isotope for an element always has the same number of electrons and protons. Isotopes have different atomic masses: all isotopes are chemically the same, the official atomic weight takes into account the total number of isotopes that are found in nature, ex. Light and radio waves of low frequencies: some radioisotopes will release ionizing radiation that will affect molecules or tissues when near water, such as the body, since a vast majority of the body is composed of water. Ionizing radiation ejects electrons from atoms, converting atoms into ions and free radicals: high doses of ionizing radiation are deathly, ex. Ions are any charged particle, meaning they have unequal numbers of protons and electrons. Ionization is when one outer shell loses an electron and one outer shell gains an electron in order to gain stability in the end: ex.
