1. Essential Question: How are the elements organized? THE PERIODIC TABLE

2.  Dmitri MendeleyevAlkali  Periodic TableAlkaline earth  PeriodTransition  Group/FamilyHalogens  Noble gases  Metals  Nonmetals  Metalloids VOCABULARY

3.  Families of the Periodic Table CONCEPT

4.  Russian chemist who first tried to classify elements based on their properties.  His table was ordered by atomic MASS (which has been changed today). DMITRI MENDELEYEV

5.  Chart that organizes information about the elements.  Each box contains:  Chemical symbol, Atomic Mass, and Atomic Number.  Today is organized by Atomic NUMBER. PERIODIC TABLE

6.  Horizontal Rows on the periodic table.  Numbered 1-7. PERIOD

7.  Also called: FAMILY  Vertical columns on the periodic table.  Elements in same group/family have similar properties. GROUP

8.  Left of step-like line.  Shiny luster.  Malleable – made into thin sheets.  Ductile – stretched into wires.  Solid.  Conduct heat & electricity. METALS

9.  Group 1.  Most reactive metals – combine with other elements. ALKALI METALS Sodium

10.  Group 2.  Also very reactive elements. ALKALINE EARTH METALS Magnesium

11.  Groups 3-12.  Give off characteristic colors. TRANSITION METALS Transition Metals

12.  Along step-like line.  Some characteristics of metals AND nonmetals. METALLOIDS Metalloids Silicon

13.  Right of step-like line.  Dull.  Not conductors.  Gases or solids. NONMETALS

14.  Group 17.  Most reactive nonmetals.  Halogens + Alkali metals = Salts. HALOGENS

15.  Group 18.  Least reactive.  Inert – do not react naturally. NOBLE GASES