CHEM 1040 Lecture Notes - Lecture 1: Chemical Formula, Stoichiometry, Atomic Number

• School: University of Guelph
• Department: Chemistry
• Course: CHEM 1040
• Professor: All

Document Summary

Please review ebbing & gammon chapters 1, 2 and 3, sections 3. 1 3. 5. Atoms consist of protons, neutrons and electrons; are the basic building blocks of molecules and ions, e. g. , hydrogen (h), oxygen (o) and carbon (c) Isotopes one of two or more atoms that have the same atomic number but different atomic masses, e. g. , 1h, 2h (deuterium) and 3h (tritium) are all isotopes of hydrogen. Molecules are formed when atoms combine due to attractive forces, e. g. , molecular oxygen, water, carbon dioxide, ammonia, methanol (ch3oh), etc. Elements (refer to table 2. 1) can be atomic (composed of one atom) or molecular (composed of two or more atoms) Inert gases, i. e. , he, ne, ar, kr & xe. Metals, e. g. , fe, cr, ag, na, ca, etc. Note: american spelling of s is sulfur; the canadian/british spelling of s is sulphur. Diatomic indicates there are two atoms combined together, i. e. , molecular oxygen is diatomic.