Chemistry 1027A/B Lecture Notes - Lecture 1: Rutherfordium, Neptunium, Ernest Rutherford

• School: Western University
• Department: Chemistry
• Course: Chemistry 1027A/B
• Professor: Felix Lee

Document Summary

Ancient greek elements: air, earth, water, fire. An elements position = # of protons: atoms have 3 basic parts. Electrons (-1) easy to add or remove. Like charges repel, all protons are constantly pushing each other apart inside the nucleus: ato(cid:373)s do(cid:374)"t disi(cid:374)tegrate (cid:271)e(cid:272)ause there is a stro(cid:374)ger for(cid:272)e (cid:862)stro(cid:374)g for(cid:272)e(cid:863) Isotope: same number of protons, diff number of neutrons. Combined elements: oxygen two together, chlorine, hydrogen. Molecule = an electrically neutral entity consisting of more than one atom (no charge) Ion = an atomic or molecular particle having some electric charge. Compound = a molecule with more than one element: 10^6 = 1 000 000 diff unique organic and inorganic substances. Organic: any member of a large class of gaseous, liquid, or solid chemical compounds whose molecules contain carbon. Inorganic: group of chemicals that contain no carbon. 1860s 52 known elements, dmitri mendeleev arranged them in a table: increasing mass, grouped elements with similar properties.