Classify each element as an alkali metal, alkaline earth metal, halogen, or noble gas.
a. F b. Sr c. K d. Ne e. At
Chapter 3: Elements and the Periodic Table 3.1 The Building Blocks of Matter A. The Atom –Dalton’s atomic theory (1802) • An _atom_is the smallest particle of matter_. • An _atom is the smallest unit of an element . • Atoms of one element are _(mostly) identical__. • Atoms one element are _different_ from atoms of _another element_. B. Elemental Symbols • A symbol represents each element. • Some are easy: C H Carbon Hydrogen • Some are harder to see: Au Sn Gold Tin • Know name = symbol for #1 - 20 for Test 1__; Know the entire list from Moodle for __Test 2__. C. Compounds are made up of __2 or more elements_ j