CHEM 1127Q Chapter Notes - Chapter 2: Alkaline Earth Metal, Alkali Metal, Diatomic Molecule

• School: UConn
• Department: Chemistry
• Course: CHEM 1127Q
• Professor: Joseph De Pasquale

Document Summary

A representation of a molecule that uses chemical symbols to indicate the type of atoms followed by subscripts to show the number of atoms of each type in the molecule. Used as abbreviations for the name of compounds. Shows how the atoms are connected in the molecule. Lines represents bonds that hold the atoms together. Chemical bond - attraction between atoms or ions that holds them together in a molecule or crystal. Ball and stick model - shows geometric arrangement of the atoms (not to scale) Space filling model - shows the relative sizes of atoms. Molecules that contain two atoms of the same element each. Molecular formula, diatomic molecule of hydrogen, consists of two hydrogen atoms chemically bonded together. 2h - two separate hydrogen atoms not combined as a unit. Two or elements chemically combine resulting in bonds. Empirical formula - describes composition of compounds. Simplest whole number ratio of the number of atoms/ions in the compound.