<p>Chapter 9 Lesson 3- Classifying Matter</p><p>Vocabulary 1. element</p><p>2. atom</p><p>3. metal</p><p>4. periodic table</p><p>NOTES</p><p>What are elements?</p><p> Scientists call elements the building blocks of matter. o Ex: hydrogen, oxygen, gold, and silver  Elements are made up of atoms.  Metals are shiny, flexible, good conductors.  Nonmetals are dull, brittle, poor conductors.  Metalloids are everything in between metals and nonmetals. o Ex: Silicon  Symbols stand for each element. o Ex: “C”-Carbon, “Au”- Gold</p><p>How are the elements organized?</p><p> Dimitri Mendeleev-Russian scientist made the periodic table.  Atomic number-related to the mass of each element.  There are 112 elements.  Rows in table are called periods. Columns are called groups.  Iron, cobalt, nickel are magnetic.</p><p>How do scientists use the periodic table?  Bananas have lots of potassium (K).  Fluorine and other elements in its column form salt.</p>