CHEM 1127Q Chapter Notes - Chapter 2. 3-4: Isomer, Structural Formula, Empirical Formula

• School: UConn
• Department: Chemistry
• Course: CHEM 1127Q
• Professor: Fatma Selampinar

Document Summary

Units of measure: atomic mass unit (amu) and the fundamental unit of charge (e) Dalton (da) & unified atomic mass unit are equal to amu. Ion: electrically charged atom whose numbers of subatomic particles are not equal. Atomic charge: number of protons number of electrons. Cations: positively charged atoms that are formed when an atom loses one or more electrons. Anion: negatively charged atoms that are formed when an atom gains one or more electrons. Chemical symbol: abbreviation that is used to indicate an element or an atom of an element. Symbol for specific isotope of any element is written by placing the mass number as a superscript to the left of the element. Average mass are never whole numbers due to the mixture of two or more isotopes. Avg mass - ( fractional abundance x amu of each isotop) i. Experimentally determine the occurrence and natural abundance of isotopes.