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Periodic Table

What is the Periodic Table

TermDefinition
Empedocles suggested that all matter was made up of 4 elements. ie. earth, air, fire, water
Robert Boyle argued that the 4 elements suggested by Empedocles were not true elements
Antoine-Laurent Lavoisier made one of the first lists of chemical elements
Mendeleyev was a Russian chemist
Mendeleyev developed the first periodic table
Mendeleyev arranged the elements by their properties
Mendeleyev left blank spaces in his table for elements that he predicted would be discovered
Periodic table a modern table in which the elements are organized/arranged by their properties
Periodic table standardized (used by scientists all over the world)
Periodic table has elements arranged in order of increasing atomic numbers
atomic number the number of protons in the nucleus
Periodic table has the chemical symbol (an abbreviation for the element name)
Periodic table has the names of the elements
Periodic table has vertical columns called groups
Periodic table has horizontal rows called periods
Metals reflect light
Metals can be hammered into thin sheets
Metals can be stretched into wires
Metals can be bent when force or heat is added
Metals can conduct electricity
Metals can be found in your foods (calcium, potassium, iron)
Metals can be found in your body (calcium, iron)
Metals Some examples of are: iron, gold, silver, copper, nickel, cobalt
Semimetals have some properties of metals and some properties of non metals
Semimetals Some examples of are: silicon, boron
Nonmetals do not conduct electricity
Nonmetals do not stretch or bend
Nonmetals break easily, are brittle
Nonmetals some examples of are: hydrogen, carbon, sulfur, nitrogen, oxygen, chlorine, phosphorus
Noble gases are found in the last column of the periodic table.
Noble gases are elements that hardly ever combine with other elements to form molecules
Noble gases some examples are : helium, neon, argon, krypton, xenon, radon.
Created by: laflammea
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